Neo-Geo/Neo-Geo CD(z) - I love this system, the 2d animations are top-notch, the library is good, and the collector value is insane. Dreamcast - I'd pick this bad boy over any current gen system (I own two). The library was amazing (Soul Caliber, Powerstone, Sonic Adventure, Rez, Ikaruga, Shenmue, etc), the graphics are fantastic, the sound system was damned good, a variety of interesting peripherals (maracas!), and it is so homebrew friendly. Sega Genesis - The controller was one of the best ever imo, the games for this system are almost unbeatable (Sonic 1-3, Gunstar Heroes, Sonic & Knuckles, Mortal Kombat, Street Fighter II, Golden Axe, Road Rash, Mutant League Footbal, etc), the graphics are quite good, and it just ate up so much of my youth