Tough one... but I'd say that Future Trunks was most badass. I mean when he TRAVELLED THROUGH TIME, turned SUPER SAIYAN, and took down two of the most evil tyrants in the GALAXY with a few swings of his sword, I nearly died of the overload of badassery.
Uhmmm, Gohan was epic in the Cell games (SSJ2 episode, anyone?), and he was pretty cool in the Frieza Saga. Every other time....eeehhh.
I like Goku, but I think he is a bit over rated...
I 愛 Vegeta cause of the way he changes. He was a total asshole when he first came to earth, but as he fell in 愛 with Bulma, he slowly let go of his pride, and accepted that he was not as strong as Goku, no matter how hard he could ever train. I nearly bawled my eyes out when he was fighting 孫 悟空 in Majin form and did that speech about his pride being torn apart によって a low class Saiyan like Goku. And when he smiled in the face of death right before he killed himself to try and stop buu? Wow. That was an emotional scene.
Goten is cute when he was little c:
Haven't seen the other movies, so I can't say much about Turles (sp?) Brolly, Tarble または Bardock, but they all seem pretty cool c: