Currently playing Grandia 2 on Dreamcast. I often revisit my old titles, nostalgia plays a big part in replay value.

Sim City 2000!!

I still play Goof Troop on my SNES every now and then. I seriously want that remade with full online support.

Yes, I still play old games.

If I like them enough, I will keep them rather than selling them, even if I don't play them often. Such games are:
Kirby Air Ride, Super Monkey Ball 2, Smash Bros Melee, LoZ Wind Waker
Mario Kart DS
various Wii games that I'm too lazy to type.

I play a handful of SNES RPGs and Sim City every few years. I always play the RPGs from beginning to the end and Sim City to the Mario Statue and then I dont touch the games anymore for a long while and after a few years I go back to them again. I am not sure why but some games have a special feel to them and they are always fun to go back to if I have the time. I also play the Half Life games Diablo 2 Warcraft 3 Silent Hill 1 to 3, Mario 64 every few years.

played Smash bros melee yesterday! a week ago almost at the end of the legend of zelda: links awakening and megaman 4, also i just got assassin creed for the Xbox 360 (yea im really late) and its really good! im going to get part 3 for the WiiU!

Command and Conquer Generals: Zero Hour... Used to play that thing like a mad man... It was soo much fun and I do play it still from time to time but the servers no longer work online T_T