Back in the day I considered this games awesome:
Spider Man 1 psx
Marvel super heroes fighting games by capcom
Marvel vs capcom, and x-men vs street fighter series
X-men Mutant academy 1 and 2
Currently I love and keep playing just for fun
Hulk ultimate destruction ps2
Spider man 2 ps2
Marvel ultimate alliance 1 ps2
Marvel ultimate alliance 2 - still playing but they removed some good stuff that was going on the first, feels like a downgrade, with a few improvments, plus some chars are so downpowered, boss battles are ridiculous, like I'm the Hulk or the thing, and bulleye doesn't move when I punch him? realistic overpowered chars should exist.
X-men next dimension- it's super hard, no move list avaible, you gotta go online and look for it, plus lots of moves and diferents combos for every chars, makes it hard to be good at this game
X-Men legends 1 - When the game ended it sucked, I wanted to keep on playing upgrading my chars and stuff, I don't want to replay the training missions over and over again to gain levels, if at least I could replay the game keeping levels.
Wolverine revenge, the gameplay was so frustating, it was so "heavy", not fluid like wolverine should be
Marvel vs capcom 2
and the ps3 games I can't play