i'm gonna have to rewatch all of them but i picked the first one just bc it's where it all started and the memories i personally associate with it.. toy story 2 is a very close second though. toy story 3 served as a great finale and wrapped up the series perfectly. i enjoyed toy story 4 but i feel like it kind of ruined the ending to 3?? 4 just added even more to the series when it was already done. like someone mentioned before, i think 4 would've been better as a spin-off