Only companys who really bear their fan base in mind, concentrate on making memorable custom soundtracks, although this is´n't always the case. The last great soundtrack I heard was definetly Mario Galaxy, but Rare(especially for donkey kong country and BK) also to me are one of the best companys at making great ass songs. I think that developers are drifting away from this aspect of gaming due to the "importance" of graphics. Back in the 16-bit day, the visuals just weren't there, so the music had to be catchy, and it really wasn't something secondary inside the game.