Time for some *****in', baby.
Character's whose confirmation I would dignify with nothing more than a shrug and a faint "meh":
Sonic, Lucario, Dark Samus, Hunter, Deoxys, Wolf, Megaman, any Fire Emblem character beyond two, Samurai Goroh, Paper Mario, almost any other Mario characters except Toad, any Star Fox character beyond three, Skull Kid, Vaati, Little Mac, Stafy, Tinstar.... and so on.
Characters I plain don't want in:
Ryu, any F-Zero character besides maybe Samurai Goroh, most 3rd party characters, Mii, Balloon Fighter, Laughing Dog, Dixie Kong alone, most Pokemon, including Jigglypuff, further Wario Ware characters, Petey Piranha, Daisy, Waluigi...
Characters who'd force me to rip out my eyeballs and burn them upon being announced:
Pacman, Tingle, Munchlax and any super-KAWAIIIIIIIII!!!!!!!!!!! Pokemon