Wow...my idea is cool!? Alright!!
I was thinking that normal form "finishers" would be really brutal backbreakers, axe handle smashes, that sort of thing. At SSJ forms they should be more flaboyant. Maybe a more arrogant or impressive finish, like Vegeta firing a little ki ball mercilessly into the other guy's face, or Piccolo easily sidestepping a blow to the face only to clobber the opponent with a blast. My favorite will be Buu, who's second form finisher animation would be something funny like watching the enemy blow his head off but have it grow back suddenly and Buu absorbs them. lol
Yeah...I like the idea about blending all the ideas into one.