I can see Thor being like "I got the biggest cock here and i'm a god yadda yadda" He be that guy at the party totally exaggerating shit. I mean for thor he does crazy stuff but he would even exaggerate that lol.
Hulk would be like "fu*k you man in tights, fu*k you naked man of silver, fu*k you hippie boy! I'm the strongest one there is!!" and not give any feats because I can't see him talking all that much.
Supes would be sipping on his milk and be articulate, "Well gee guys I did some pretty amazing stuff to..." and get cut off by Thor bragging about crap.
Silver Surfer would be boring to listen to in my opinion. Probably have the coolest feats but be so boring to listen to. He might also order water!