I was playing Budokai Tenkaichi and I really don't like the Funi voices so I switched to the Japanese Seiyuu and some are good well others aren't.
Goku's voice was actually better as a girls then that innocent man-child.
Kuririn's voice was awesome (maybe because it's the same as Luffy's)
Gohan's sucked. I actually prefered the Ocean dub to his Seiyuu (even though it's the same voice as Goku, which is odd.)
Piccolo is way better then the gruff fighter that he is in both dubs.
Vegeta is WAY better and sound more meancing when he's calm rather then sounding like he's constapated all the time.
All the other voices pretty much sound the same to me. Only in a different language (though I haven't gotten past the Saiyan Saga yet.)
Though, WTF is the deal with the different pronunciation of Saiyan. What was Funi smoking when they told them the way to say it.