Mario Vs. Sonic.

[Baegal]

Sonic > Mario.
Mario's great, but Sonic 3 & Knuckles is still the undefeated champion of both series' 2D platform games.

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I naturally lean to Sonic simply because it was my first video game series ever, but the games after SA2B (excluding Generations) were pretty bad. I love the classic sonic game series, and even though I'm disappointed with the way things are running, I can't stop loving it.

I've always liked Mario, but the only games from it I genuinely and wholeheartedly loved were PM64 and Thousand Year Door. The series as a whole is well done (except for the constant rehashing of NSMB), I just for whatever reason am attached to Sonic