Alternate Character Interpretation: Johnny Yong Bosch has said that he personally played Adam in "Once A Ranger" as someone who had grown into a lone warrior and traveled the world using his Ranger powers to help people, and that his remark about going back to his dojo in Angel Grove at the end of "Once a Ranger" was a lie.
Anti-Climax Boss: Flurious, despite have the Corona Aurora and the jewels gets beaten fairly easily by Mack with the battlizer.
As this was the last "bad" season (As seen by most of the fans) before Samurai, fans are divided as to which is worse (Turbo and Wild Force being largely Vindicated by History thanks to the two newer seasons) between the two.
Either the theme song eventually grows on you or it's among the worst in the entire franchise. There seems to be absolutely no middle ground.
Contested Sequel: Operation Overdrive has a massive negative reputation among the fans, even among the Disney Era seasons. The shift in the overarching plot was a large departure from traditional Power Rangers fare (which naturally caused some negative feelings due to it being different), the acting was a far cry from the quality set by SPD and Dino Thunder (though it wasn't as bad as some past and future seasons), the late-season Jerkass qualities by Mack due to The Reveal were rather inconsistent and unfounded, and the explosion count became insane, topping in at over 250 in the entire show. Thanks to all of this, this commonly is on the top of many "Worst Season" lists.
Designated Hero: Some feel that the team's 10-Minute Retirement after losing their powers in the "Once A Ranger" anniversary special runs entirely opposite to the idea that even without powers, a Ranger never gives up, and that the Overdrive Rangers aren't worthy of being Rangers as a result. Although for what it's worth, none of the past teams who endeavored to keep fighting without their powers had backup; Previous Rangers had to decide between 'keep fighting or let the bad guys go unopposed.' The Overdrive Rangers' options were 'Be the Red Shirts or let the veteran Rangers who have everything perfectly under control handle it'
With that said a valid argument could be made for a Power Ranger team-up episode to have the two ranger teams actually work together. Even if the Overdrive Rangers stuck to battling the Brothers and flunkies while the Rangers handled the major threats, or they stood on to act as support in some fashion, it wouldn't have been received with quite the same negative reaction. note It doesn't help the Overdrive team still has their civilian powers, which they had frequently used to dispatch the flunkies of the season. Unfortunately, said powers are not mentioned once the entire team up.
It doesn't help that when Hartford reminds them of their mission of finding the jewels to the Corona Aurora, Will outright states that their job was to be Power Rangers. Despite the fact that Hartford outright stated that the primary mission of Operation Overdrive was to find the jewels in the first episode! note Second technically, but it was a two-parter.
Ensemble Darkhorse: Spencer, the Hartfords' snarky butler who makes the best jokes this season.
As far as the villains go, Kamdor and Miratrix are pretty well received, some go as far to state that they should've been the season's main bad guys instead of the brothers.
He Really Can Act: While Overdrive is regarded by many as a sub-par season, even detractors said that James Maclurcan was fantastic when it was revealed that Mack was a robot. His shock, sadness and anger came off as genuine.
It seems that the Magi Yellow/Mystic Yellow outfits leads to wearing gold- Chip's actor, Nick Sampson voices Sentinel Knight in this season, while in Tokumei Sentai Go Busters, Magi Yellow's actor is the Gold Ranger.
This was a Disney-owned superhero franchise with an episode featuring Thor and Loki, and since then, Disney's given up Power Rangers for a different superhero franchise featuring Thor and Loki.
Moral Event Horizon: While Flurious is never a nice guy from the start, tricking his brother, who'd come on his hands and knees offering peace, into handing over the Corona Aurora with an offer of friendship, then killing him off in cold blood definitely pushes him over the line.
Kamdor crosses it when he traps Miratrix in the same jewel she freed him from when he tells her she is no longer of use to him. Sure, Miratrix was a greedy ninja who used Dax's affections, but her fate crossed it for her master.
Never Live It Down: Will's actor, Samuell Benta's "banner incident" still hasn't seemed to die down in the fandom yet, and it happened in 2007. This is because, when he claimed he was invited back for Super Megaforce, fans were absolutely outraged, and all of a sudden everything erupted again. Although, generally speaking, stealing from a charity for sick and dying kids is a very good way to be remembered for just that one thing for as long as you live no matter what else you do in your life.
The theme song. A majority hate it but others have cited it's not as bad as many make it either. It feels like the hate is more just from initial reaction and never really letting it sink in (rap is a pretty diverse genre of music). Most fans have admited it pretty catchy if given the chance and that there are worst rap themes out there.
The show itself. It has a lot of shortcomings, but some good ideas that are pulled off nicely as well and the overall story is still a pretty decent watch.
The show had even less popular Rangers (save for Mack and Ronny, who are well-liked by fans). Of all the rangers, Dax seems to sit on top of the list.
They tried to give him quirks like Bridge from Power Rangers S.P.D. but he came across more annoying than funny. That being said, he's far from being one of the most hated Rangers ever, but he isn't very popular among Blue Rangers.
Will has become a Scrappy these days, mostly due to his actor being seen as an egotisticaljerkass in the eyes of a significant portion of the fandom. And for stealing a banner in the first Power Morphicon — which was supposed to be auctioned off for charity!
Before the banner incident with his actor, however, Will was actually relatively popular. But after that, he started getting unfairly bashed.
Norg is also seen as a Scrappy by the majority of the fan base.
Tyzonn isn't necessarily hated, but he's widely considered to be one of the franchise's blandest sixth rangers, due to his lack of personality and just being kind of "there". His thin backstory and naivety doesn't really help.
"Once A Ranger" made Alpha 6 this moreso than Turbo thanks to having a new, horrible voice.
Stock Footage Failure: Ronny in her morphed form. When? Well, check out when the rangers do their roll call, near the end. If they're all in a group...
They Wasted a Perfectly Good Character: Mack got the most development during the last few episodes of the season due to learning he was an android, so the other rangers received little. The ones that needed it the most were Ronny, Rose and Tyzonn. The latter especially, since his backstory featured his quest to avenge his friends by destroying the Fear Cats and reunite with his girlfriend, but was resolved in the last episode before he even has a chance to start looking.
Thrax being the long lost son of Lord Zedd and Rita Repulsa had much potential as a character. Unfortunately, said character, despite successfully cutting the Overdrive rangers from the morphing grid for most of "Once A Ranger", ended up becoming rather inept, getting angered easily and making several mistakes during his plans.
They Wasted a Perfectly Good Plot: Tyzonn's backstory was pretty tragic with losing his friends in a cave-in and vowing to avenge them by defeating the Fear Cats. However, he learns his girlfriend survived the cave-in and decides to go searching for her. This is resolved... by Norg bringing her to Tyzonn at the mansion after the rangers defeated Flurious. So Tyzonn didn't even get a chance to even officially start his new quest.
"Once A Ranger" had the potential to be a great team-up and anniversary, but extremely botched. It's the first time Angel Grove is in Power Rangers since the Zordon Era, but is set in a warehouse and none of the familiar locales are seen (Probably because of a low budget, recreating them would've been too expensive). The son of Rita and Zedd is introduced, and then ended up being extremely underwhelming. Five past rangers return, though mostly favoring the Disney Era and Alpha 6's return meant Lightspeed Rescue, Time Force and Wild Force were not referenced at all, along with the veteran team being shown more effective than the Overdrive team.
Tough Act to Follow: Once A Ranger got this since Forever Red, the tenth anniversary special, was pretty well received.
Unintentionally Unsympathetic: The Overdrive Rangers are meant to come off as sympathetic in "Once A Ranger" when they lose their powers and feel useless enough that they quit. However: 1) They still have their civilian powers, 2) Their mission was not to be just Power Rangers, but to find the jewels, which they could still do while the veteran rangers dealt with the monsters, 3) All of them, save for Tyzonn, were gloating about how awesome it is to be Power Rangers before being reminded it's about saving lives, 4) They only return because they found returning to their old lives boring rather than wanting to actually do something heroic, and 5) Mack, unmorphed, uses Excelsior to slash through a giant monster in half. While Excelsior's power is hyped up this episode, the fact remains that Mack had to jump several hundred feet in the air, and perform a slash powerful enough to one shot the monster. With civilian powers this strong, why complain about not having Ranger powers.
Vindicated by History: In recent years though, after everything's cooled down, some fans have admitted there were some good ideas and, compared to SPD and Mystic Force, at least managed its characters better (actually focusing on the rangers this time and distributing equal time to the villains. Especially since there are four factions this time). The serialized nature of the season in contrast to others meant that the plot was always moving forward- finding this MacGuffin to find the other, which leads to the next Jewel, which starts the hunt for the next MacGuffin... The execution, on the other hand, really hampered the series and brought down what otherwise is a pretty decent globe-trotting adventure story. The general opinion on Overdrive these days is "Interesting premise, lackluster execution."
To a lesser extent people have compared it favorably to the mostrecent seasons. Though you're as likely to find people who despise Overdrive just as much.