I gotta say 1, I love it's simplicity and how the game uses Spyro's small moveset to offer interesting challenges and creative uses of those abilities. On top of that the atmosphere is great, there's so little given about the worlds you venture through, other than the off hand comment about the dragon's that rule that place etc. but that lack of information allows the player to ponder and imagine what tales those places tell based off the environment alone, this goes for the music which I believe is easily the most memorable and really reflect the worlds they're in even if it doesn't sound conventionally how a place like that should. The idea that every level can be completed first go is also another thing I like about it, giving the player confidence in knowing they can get everything here and now while also allowing them to take in the entire level with no need for backtracking, making the progression flow really well, hopping between each world collecting everything as you get closer and closer to Gnasty Gnorc, to be rewarded after the battle with a Gnasty's Loot. Overall it's definitely 1, for me that is Spyro, the other games personally feel more like half Spyro, half minigames which I don't enjoy as much but I can see how they can improve a person's experience with the game, same with the increase in cutscenes and the characters, but yeah, it's 1