Mainly used characters My Super Saiyan 4 Goku set-up is pretty basic.
Goku:
-Kaioken
-Super Saiyan
-Super Saiyan 2
-Super Saiyan 3
-Super Saiyan 4
-Kamehameha
-Kamehameha (I tend to use this Adult Gohan setup)
Adult Gohan:
-Super Saiyan
-Super Saiyan 2
-Elder Kai Unlock Ability
-Kamehameha
-Kamehameha
-Z Sword
-Mixed Blood Power (A long with three transformations, and two Attack up, and one Defense Up capsule supporters, he does some nice damage) *2 Attack up with MBP and T-Swrd and a defense boost from MBP as well*
Vegeta:
-Super Saiyan
-Super Saiyan 2
-Super Saiyan 4
-Galick Gun
-Galick Gun
-Final Impact
-Battle Testament (Not as good of a fighter as I expect in DBZ Budokai 3 since most of his movements are predictable when used in battle, but never the less cool)
Time to time used characters Those are were the 3 Characters I mainly used the most, but these are others I will use time to time.
Uub:
-Ki Cannon
-Ki Cannon
-Fierce Flurry
-Fierce Flurry
-Fruits of Training
-Concentration
-Yakon (Uub is a really fun character to use in the game, with all his zanny moves and combos and skills in all. Since there are many characters that transform in the game Yakon cripples them)
Kid Buu:
-Kamehameha
-Kamehameha
-Vanishing Ball
-Vanishing Ball
-Demon Realm Flames
-Potential (Just like Uub, Kid Buu is pretty powerful and fun to use just because of his crazy attack patterns)
Omega Shenron:
-Whirlwind Spin
-Whirlwind Spin
-Dragon Thunder
-Dragon Thunder
-Minus Energy Power Ball
-Appetites of Man
-Yakon (For the final and great Character of DBGT he is not all he is cracked up to be, but he is still fun to play with when I get board of my mainly played characters; once again, Yakon cripples transformers)
Broly:
-Legendary Super Saiyan
-Blaster Shell
-Blaster Shell
-Gigantic Meteor
-Gigantic Meteor
-Kakarot's Crying
-Concentration (MEGA POWERFUL!)
Trunks (Teen):
-Super Saiyan
-Super Saiyan 2
-Buster Cannon
-Buster Cannon
-Fruits of Training
-Mixed Blood Power
-Concentration (Pretty cool and powerful fighter, but he is still mearly the weaker version of Adult Gohan though)
Most used Fusion character Vegito: (DUH)
Yawn - what is there to say?