Mario ofcourse
One of my favourite series so many great games so much nostalgia but also gameplay wise outstanding. especially the adventure 3d games. mario 64 sunshine galaxy etc. But also the older 2D titles I enjoy.
Zelda games are good but to be honest I've never been a real zelda fan. I never understand the zelda hype by many, I have to say though that the collectibles are really nice but gameplay wise I'll give the win to mario. The zelda games are excellent though I've enjoyed twilight princess, ocarina of time, skyward sword, windwaker and even hyrule warriors so far, the games are definitly enjoyable.
I really like the cast in skyward sword compared to the other zelda games I don't get why that game gets so much hate. Zelda is way better in this game than any other zelda game.
I will miss ganon in smash though one of my favourite characters to play in smash to disrepect bad and good players. So many awesome thing a ganon can do in for glory when one has mastered the triforce of power :p