Off the top of my head;
Blaz Blue: Hakumen
Capcom vs snk 2; E.Honda, Blanka, Ken, Rock
Capcom vs snk chaos; Violent Ken, Dan
Dragonball Z: Budokai 1: Cell, Great Saiyaman, Teen Gohan
Dragonball Z: Budokai 2: Great Saiyaman, Hercule, Cell, Super Buu, Kid Buu, Teen Gohan, Raditz.
Dragonball Z: Budokai 3: Cell, Super Buu, Kid Buu, Teen Gohan, Kid Gohan, Raditz.
Dragonball Z: Budokai Tenkaichi 1: Gohan, Teen Gohan, Kid Buu, Cell, Broly, Super Buu.
Dragonball Z: Budokai Tenkaichi 2&3: Yajirobe, Kid Gohan, Ultimate Gohan, Teen Gohan, Gohan, Kid Buu, Cell, Broly, Jeice, Burter
Dragonball Z: Burst Limit: Teen Gohan, Cell
Guilty Gear: Robo Ky
King of Fighters 98: Kensou, Goro Daimon, Joe
KoF XI: Shen, Kensou, Ash
KoF MI: Rock Howard
KoF XIII: Ralf, Shen, Clark, Kensou
Melty Blood: Actress Again Current Code: Riesbyfe Stridberg
Marvel Vs Capcom 2: Captain Commando, Venom, S.Samurai, Ken, Megaman, Iceman
UMvC3: Hulk, Thor, Deadpool, Haggar, Nemesis
Naruto Clash of Ninja 2: Kiba, Kankuro
Naruto: GekitÅ Ninja Taisen! 4: Kiba, Kankuro
Samurai Shodown IV: Kazuki Kazama
Samurai Shodown V: Gaoh, Kazuki Kazama, Enja, Galford
Sengoku Basara X: Yukimura Sanada, Tadakatsu Honda
Soul Calibur 2: Yoshimitsu, Astaroth
Soul Calibur 3: Abyss, Yoshimitsu, Astaroth, Maxi
Soul Calibur 4: Yoshimitsu, Seong Mi-na, Hilde, Astaroth
Super Smash Brothers Melee: Samus, Link, Young Link, Ganondorf, Mario, Captain Falcon
Super Smash Brothers Brawl: Samus, Ike, Link, Metaknight, Snake, Sonic, Wolf
Pocket Fighters: Ken, Hsien Ko, Dan
Street Fighter 2: Ken, Ryu, Blanka, E.Honda, Chun Li
SSF2 Turbo HD Remix: E.Honda, Blanka, M.Bison
Street Fighter EX: Skullomania, Blanka, Ken
Street Fighter 3: Q, Twelve, Ken, Sean
(Super) Street Fighter 4 (AE): E.Honda, Blanka, Dan, Guile
Street Fighter x Tekken: Yoshimitsu, Marduk, JackX
Tekken 2: Yoshimitsu
Tekken 3 - 6: Yoshimitsu, Law
Tekken Tag Tournament 2: Yoshimitsu, Kuma, Kunimitsu
TMNT tournament fighters : Mike, Armageddon, War, Leo
Virtua Fighter 4: Jacky
Virtua Fighter 5 FS: Jacky, Taka-Arashi
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That's all I think.
And yes these are my mains, I use the listed characters close to an equal amount within each game