I love S/W - if I had the means$, the time, the knowledge/experience I would love to start one, the variety of fish, coral, live rock, love them all! seahorses, rays, sharks, eels, crabs, shrimps - all so unusual. Angels, triggers, tangs, angler, etc. etc. Colors galore!
But for F/W I love my discus (tho I can't decorate it properly since I have juvies to start off with).