I can't be the only one thinking that remakes are usually not worth it...Been my experience that when a game gets a remake, it usually ends up being horrible or nothing like the original to the point where everyone goes back to the old game...
But if I HAD to choose...I'd say the ORIGINAL Spyro game. The one Insomniac made, not any of the ones that came out on the PS2. They do not count. And really, just the original. I like the other two Insomniac made just fine, but I've wasted sooooo many hours on the original, it's not even funny.
Other than that...Crash...or Ape Escape. Never owned either, but I always had an awesome time playing when I got the chance.