All i ever recall Space Ghost saying was "damn" once during the episode where they're just coming up with a script, Jixby. :/
Haven't seen Excel Saga, but if it's even weirder than Fooly Cooly (?), i'm definitely interested.
As for Trunks voicing the guy? I can't recall many other people that sound like trunks in all the other dubbed anime i've seen over here. Likely he's just good at voices, but as long as it's not the fellow who does Goku or Samanosuke, it's plus points in my book.
edit: Goku is voiced by a fellow named Ian Corlett, who has a
big-ass list of voicing credits.
This is Trunks'. Notice a difference?