These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Megaman Battle Network
Alternate Character Interpretation: Annetta was a completely different character in the anime. Not to mention, there's evidence to suggest that Annetta (in the games) is a Well-Intentioned Extremist. (It's also easy to assume Plantman acts as an evil conscience to her)
In Network Transmission when the Professor reveals himself after Zero's defeat, the whole Cyberworld MegaMan, ProtoMan and Zero are standing in inexplicably starts shaking. This shaking is never mentioned again.
Battle Network 4 is filled with these. Although you could blame how the scenario system works as to why nobody ever seems to comment on most of the stuff, it doesn't change the fact that there was some seriously weird stuff going on.
If you look at the series as the continuous story it is supposed to be, the entirety of Battle Network 4 is a massive BLAM. The game ends with a meteor about to destroy the planet, and it's resolved by everyone on the planet cheering for Lan and MegaMan. In BN5, none of this is ever mentioned.
Broken Base: The fanbase is decidedly split between those who think the second and third games are crown jewels, and those who think of the fourth game as such. The fourth game is notable for being considered completely abominable by critics and just about everybody else (despite being the highest selling in the series).
Complete Monster: Slur is possibly the worst villain in the EXE saga. No redeeming qualities are ever attached to her. Still doesn't hold a candle to Dr. Weil, however...
Awesome Music: The music in general stays fairly high-quality throughout the series. Some examples of particularly awesome music, however:
BN2's theme for the final real-world area, Kotobuki.
Don't forget the Gospel Area, WWW Area, Hero (similar to the main theme), Main, and Final Boss themes.
Demonic Spiders: Battle Network 3 has the Scuttlest viruses in the Secret Area. They start combat with a Battle Aura that requires a single hit dealing 100 (or 200, for the stronger ones) damage or more to take down, come in groups of three, and have homing attacks that deal 200 damage apiece. To make things worse, you will encounter one that can hit the elemental weakness of the style you are currently using, and they come in groups of 2-3.
Cloudies. When combined with Swordys, they are the stuff of nightmares.
Swordies get kicked a fair bit down the totem pole in later games. Also, in 4, the UnderNet is infested with actual spiders that invade your area, not only forcing you to dance around (you have a Slasher, right?) and put you in the line of fire of everything else, but also covering your section with sticky webs that will catch and hold you for a few seconds, which can generally spell death in the deadliest sections.
Higher levels of most viruses generally qualify for this, given significant boosts in speed and power.
Ensemble Darkhorse: There's a very good reason Mr. Match has been in five out of six games. And why HeatMan is the only Navi he uses is more than one of them.
Higsby HAS appeared more often than the majority of the supporting cast...
Princess Pride.
Bass. Holy freakin' crap Bass. He might very well be the most popular Navi in the entire series.
Punk.exe isn't especially popular among the fanbase, but his existence is an expression of Keiji Inafune's love of the classic Mega Man Killer (who actually was a darkhorse from the original series).
Other Navis, such as ProtoMan, Colonel, SearchMan, and TomahawkMan, are straighter examples.
Fan Hater: If you like the fourth game, be very careful about which EXE fan you mention that to. Hell, if you like EXE in general, be very careful about mentioning that around fans of the Classic, X, Zero, or ZX series. Verycareful.
Fanon Discontinuity: Generally one minute before the end of the ending of 3.
Some like to pretend that 4, in its entirety, never happened.
The 4-only bit is generally more common. Admittedly, a good few people have a problem with the whole Disney Death thing, but that doesn't mean that 5 and 6 are cut off so wholeheartedly.
Franchise Killer: Battle Network 4 had extremely high sales thanks to Battle Network 3, but its poor reception by critics and fans effectively ended things. MMBN 5 saw a 33% cut in sales, and they were forced to end the series with 6.
Game Breaker: A lot of the folders you can find on GameFAQs, Gater folders/GateMagic get special mention.
There is also Gospel duping, a bug that allows some gamebreaking folders in 2 to be made.
Don't forget 3's FolderBack chip, easily the most broken chip ever made. Its one and only downside is it recycles opponent's chip in netbattle. God help you if they recycled a Navi recycle and recycles their buffed up chip.
3's is an evil nest of Game Breaker. The big three Navi chip is crazy. One is a field nuke stun, second is a long duration stun and the last hit so many time that a buffed one does sick amount of damage. It is nearly the same reason why Navi Recycle is so damn broken.
The first Giga Chip you are likely to get are this in 3 (the aforementioned Folderback and Navi Recycle).
Maybe in single-player, but if you're playing a human opponent, you're just asking for a Heat Spread. A successful hit will usually wipe out most (if not all) of your Grass Stage, and deal Quad Damage to boot. Failing that, any time-stopping multi-hit attack will bypass Undershirt anyhow.
In the first game, any chip that deals ≥100 damage. The most HP you'll experience is a thousand - that's right, with one chip, you can take out a tenth of the boss's health. And you don't even need those to use on the Final Boss considering the Eleventh Hour Superpower that you get.
If you customize your health high enough in BN 3, Muramasa (deals as much damage as the health you've lost) becomes incredibly powerful with little consequence, because of the fact that the limit of the amount of damage it could go up to was 999, which is enough to nearly kill most high level bosses in one hit (Especially, Bubbleman, whose V3 Random Encounter form only appears if your health is at critical).
Getting Crap Past the Radar: The aforementioned whiskey rap, from MMBN2. In that same game, Gauss shouts "Damn it to hell!" after his plans are foiled.
Extremely debatable. The Battle Network series is the result of a For Want of a Nail with Light researching internet technology rather than researching robotics like he did in Classic. In Name Only implies that the only thing that ties Battle Network to the rest of the series is the title (and possibly characters). This would probably better fit Mega Man Star Force, but again that might be debatable.
The names make much more sense in Japanese where they were Battle Network: Rockman.EXE and Shooting Star Rockman, since it used the actual MegaMan's names in the title like every other series (except Legends), since the Battle Network MegaMan is Rockman.EXE, and Star Force MegaMan is called Shooting Star Rockman.
Nightmare Fuel: CircusMan in Battle Network 6. He has an attack that the fanbase infamously nicknames as the "Tent Rape Attack". If that isn't bad enough, the first time you see him, you witness him opening his chest to reveal a vacuum, which he uses to absorb and capture one of the two Cybeasts. If that still isn't enough for you, he also successfully uses it on MegaMan later! He's basically Kirby, without the power transformation part and hundreds of times creepier.
Seinfeld Is Unfunny: Try just viewing videos on YouTube of the fifth and six Mega Man Battle Network games; then try viewing ones of the first and second, especially the first. The first one appears so laggy and bare-bones. (No style changes, no navi merges...) It's pretty obvious that they were still experimenting. Not to mention, with the amount of Fake Longevity it was hard to get into the first Battle Network game because of all the tedious backtracking, artificially-lengthened stages, and game breaker chips.
Sequelitis: The fourth, fifth, and sixth games. The third game rather coherently ended the Dr. Wily plotline, the Bass plotline, and ended with MegaMan's Heroic Sacrifice. Following that the series had a major graphical shift, Style Changes were replaced with Soul Unisons (among numerous other gameplay changes), and Dr. Wily and Bass are somehow still alive. The plots also got quite weird, with the fifth game arguably taking the cake—the Big Bad's plan is to link the literal souls of everyone on earth via the Internet.
Tainted by the Preview: Go ahead. Say you're glad they're keeping the old graphics and Internet in the BN1 remake around fans. I dare you. Although this is because the original internet was very difficult to navigate, which may be mitigated by the map function also revealed in the preview.
That One Boss: ProtoMan.EXE is usually one of the most aggravating bosses to fight in most games, if only because he tends to block anything thrown at him with his shield until he comes out to attack, which he does very quickly, leaving only a small window of opportunity to strike back.
DrillMan.EXE in 3.
BubbleMan.EXE in 3. The continuous spew of damaging bubbles not only blocks your attacks, but also severely hampers your movement and a new one is made the instant you blow one up. Coupled with all the other obstacles thrown on field and the fact his third version can only be encountered at critical health...
That One Level: It's not particularly hard, to be honest, but you'd have to search hard to find five or more people who enjoyed the carnival levels in BN4. Brrr... that music.
Actually, what about the waterworks level in the first BN? You have a (somewhat) long stage full of slippery ice. It seems like you deleted what was causing the water to get held up but guess what? Now the water is purple and everyone's poisoned so you have to go through the stage all over again.
For that matter, the Power Plant, also in the first game. While veterans to the series won't mind the lack of post-battle healing (the later games had it as a facet of the system as opposed to a one-time gimmick) there's the fact that you're on a limited battery life, have to solve frustratingly vague logic puzzles, and the random battle rate is through the roof. Oh, and did we mention that a large part of the level is an invisible maze?
They Just Didn't Care: The most common theory held by fans as to Operate Shooting Star's lack of new content.
This Troper always assumed that Navi were like Warforged, and their gender identities were purely visual, anyways. So it's not so much that Serenade "transcended" gender as just didn't consider it worth its time to bother about something so "human".
Also, despite it being completely unambiguous in-universe, this troper still can't believe that Raika is male. Please tell me I'm not the only one.
Villain Sue: Slur. When you can take THREE P.A.s and a sword swipe to the chest and not even flinch, you know you've gone too far.