Reiterating some things said here:
-KH 1&2 (1 has a better story, but 2 has better gameplay)
-Resident Evil 4
-FFX (I would vote for skipping FFXII unless you really want to play all the FF games. Its story is easily the worst of the past 10 years. However, its gameplay is some of the best, IMO... or at least it moves quicker (no swirly screen load-ins).
-I really enjoyed Persona 3 FES, for its extremely long playtime (easy to get up to 60 hours even without exploring all the options, and then there' replay mode, and the second game on the disc) and very good story. However, the dungeon aspect can be boring.
-For Star Ocean, I enjoyed Til the End of Time, but could never beat it. About halfway through I always get bored and stop; this has happened three times now.
-GTA games are pretty fun.
-Edit: .hack was interesting, but in the end it made very annoyed that they marketed it as several games, forcing you to spend $150 for a game that should have been 5 discs, not 5 games with a disc a piece. I played one of them (the first) and that was all.
Edited, Aug 17th 2009 9:14am by LockeColeMA