I perfered the original MD, with the Headphone socket, Got one around somewhere
I got mine all hooked up. Original MK1, with a MK1 MegaCD and over 50 games on it, including some of the best RPGs you'll ever play:
Shining in the Darkness, Shining Force 1 & 2, Phantasy Star 2-4, Landstalker, and many classics: Sonic, Gauntlet IV, Kid Chameleon...
Don't let me get started on retro stuff, I've got about £2,500 of the stuff in my house!!!