Ah, the good old Sonic/Mario rivalry. My neighbor had a NES, and I spent a good deal of time over there playing Mario Bros. and Duck hunt and what have you. Never got very far, but it was loads of fun. For my part, I had a genesis. Played a lot of Sonic 2 and 3. Actually beat three once, though I remain unable to actually complete 2 without cheating or a lot of luck. Stupid final stage with no rings...