I like most music from the Zelda games, namely the tunes from Ocarina of Time. Mario games usually have good music, too, especially the music from the older games in their 8-bit glory. I like it when a game has good music, but if it doesn't, that doesn't mean I won't still play it. Music just brings a whole lot more to the game.

I also really, really loved the music in Golden Sun. The theme for the Elemental Stars is so beautiful. Sometimes I'd just let my Gameboy Advance sit next to me while Isaac stood in the Stars room so I could listen to it.

The music in the Megaman Battle Network series is good, too. I really like the opening music, it gets me pumped up.

The Kingdom Hearts games have great music, too.