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: Spyro The Dragon
The classic trilogy
Complete Monster - The Sorceress. She kidnapped baby dragons, why? To tear their wings off and make herself immortal! And not for any good reason. She's just a power hungry monster who wants to live forever. No wonder she got one of the most painful death of any villain, getting melted in acid.
And the worst part? She didn't need to kill them! She just didn't want them squirming around when she tore their wings off!
Crack Pairing - There has been an upsurge in Ripto/Elora fanart and fanfiction.
Ensemble Darkhorse - The Egg Thieves in the first game. The second game had only a single thief challenge in Shady Oasis, but the third game had a bunch (usually involving supercharge ramps).
Ripto has his moments.
So does Hunter, who progressed from minor aide to partially playable after Ripto's Rage and is the only character besides Sparx to make it through from the original trilogy to the Legend series, albeit in a rather different form.
Moral Event Horizon: The Sorceress planning to kill 300 baby dragons just so she could become immortal. And what's worse, she didn't actually need to kill them.
To clarify, she didn't have to kill them, "It just stops them from wriggling so much!".
That One Boss: Ripto in Ripto's Rage isn't especially difficult, but it's considerably tougher than the game's previous bosses and much, much harder than the final boss in the first game. He has three stages and depending on your luck, each one can last quite a while.
Spike, the vaguely Cyberdemon-looking second boss of the third game. Much, much harder than the boss before him, and quite a bit harder than the boss after him.
That One Level: In Spyro the Dragon, Tree Tops. Oh God Tree Tops. The level appears simple enough, but in order to get to one dragon and a clutch of gems, the player must take a completely unintuitive (and difficult to pull off) route via the supercharge ramps.
Spyro himself lampshades how hard it is when you rescue the dragon trapped at the one of the thief's house.
"Yea, Well you could've found a easier place to get stuck!"
Haunted Towers from the same game has a whole area which is entirely hidden from the rest of the level - and again, only a difficult and not-hinted-at supercharge will lead you thee.
Spyro 2 has Fracture Hills, a level that contains a notably frustrating Escort Mission. Annoyingly, if you beat it at the first opportunity, you won't be able to complete the subsequent mission until you've unlocked the Headbash - forcing you to come back to the level and replay the Escort Mission at a later date.
Worse if you kill them with superflame before doing anything else. Turns out the guy you had to escort was supposed to take a route that included every Earthshaper in that area anyway, despite Hunter being next door. However, you get a Crowning Moment of Funny by doing so in that Hunter, not noticing there are no Earthshapers outside the door anymore, makes the Orb challenge end as soon as he exit said door.
The flight levels/speedways can also be frustrating until you are familiar with their layout - the flight levels in the first game are particularly difficult, but they got easier in Ripto's Rage and Year of the Dragon (where there is a clear optimal route for taking out obstacles, and in YOTD, Sparx outright tells you the order to tackle them.
That One Puzzle: The seed-planting challenges in Ripto's Rage and Year of the Dragon require quite a bit more strategic thinking than usual. The one in YOTD is particularly troublesome, because even when you know what to do, it requires some very difficult jumps.
A horrible sidequest in the 2nd game in which you must collect 50 gears on a trolley. Sounds easy, right? It's not. The camera is rigged and the jumping is counter-intuitive. Hitting the signs is the worst part, though. Have fun!
The speedways. Those Goddamn speedways.
The games release between the classic and The Legend of Spyro trilogies of:
That One Level - The second Hunter level in A Hero's Tail. WHY WOULD YOU PUT TEMPLE OF DOOM OBSTACLES WHERE SPYRO CAN'T GLIDE PAST THEM?!?
Skylanders' Spyro has broken it again. Some say it completely ruined Spyro because they don't like Spyro's design while others say they like the look of the game itself and Spyro's look isn't that bad.
Draco in Leather Pants: The biggest of the offenders being Ripto, Red, and Malefor (and possibly Dark Cynder if you want to count her in). So bad with some fans that it's lead to a lot of artwork flooding deviantART galleries and some pretty odd Fan Fiction.
And in Malefor's case, it's gone out to being as bad as to make him be not evil at all, but merely under the influence of some other monster and that he crushed the eggs to save them. Tell me that isn't a severe case of this trope...
Ron the Death Eater - Both Cynder and Ember have gotten this treatment by the fandom. A bit more common with Ember, as her one sided crush on Spyro is often used to make her a Clingy Jealous Girl trying to break Spyro and Cynder up or kill Cynder and have Spyro to herself.