Though some of my favorite games ever were on the Genesis (Gunstar Heroes, Phantasy Star II-IV, Thunderforce series), overall I'd have to say it's SNES all the way. Better sound and music, better graphics (many more colors onscreen simultaneously, mode 7 effects), and just a flat-out stronger library in almost all the genres I love best (RPG's, action/adventure, platformers, fighting games, racing... about the only genre where the Genny whipped the SNES' ass that I actually cared about were scrolling shooters, and even then, the SNES had a couple of quality offerings like Axelay and Space Megaforce). That said, I couldn't imagine not owning both systems - there were just too many quality exclusives for each.