Here comes mine (not in any specific order):
Number 1: Stage 2 in Castlevania, The New Generation. I can listen to this forever, the composition is so awesome!
Number 2: Phantasy star 4 into. The music is just pure bad-ass!
Number 3: Star light zone in Sonic 1. The music just fits the stage perfectly and has such an elegance to it
Number 5: Intro music to Thunder Force 4. Well, this is one of the coolest intros coupled with magical music!
Number 5: Devil´s crash intro. Oh man, Tecno Soft delivers once more.