This was a bit hard for me to answer, since there are so many games where I like one or two tracks, but don't really think about the whole set. And saying something like "Mega Man 2" or "SaGa 2" almost feels like a cop out answer because I also just like those games...

Though the game that immediately popped into mind was actually Azure Dreams. I like the energy behind it and how most of the tracks are renditions of the same one. (Sorry I don't know how to describe it, I'm not much a music person...)