Hrmm...Goku this time, I think.
Goku's hot but he's too nice. Things wouldn't be interesting after that. Vegeta manages to piss off everyone all the time, so he's gotta stay.
One thing I'd like to point out is some of your text buttons have very small hit areas only where the letters are (i.e. the words "Meanwhile, in Gohan's room") and it was kinda hard to click it.
The other is that it was much too short! Moooooorrrre!