Not that many have aged well in terms of gameplay, aye.... The only one that sticks out for me straight away is Silent Bomber- that was utterly freaking intense for a PS1 game.
I guess it's a nostalgia thing- like listening back to a great old song on vinyl even though the sound quality is a bit crap.
I have as you can see in this thread:
You're right, it isn't. At this moment you are trapped in a strange dream of days long past.
........Oh hi, EWS- I didn't recognize you.