I don't have a character in mind specifically just yet.

I like to do slightly off kilter ones usually.  

Maybe a Scout who is just a little too gungho, getting further out ahead than he should, putting himself (and thus the squad) in bad situations.

Maybe a Scout who has a big head and is convinced that he will be the one to survive everything, accomplish all the things, and gain all the praises and commands and general big dick awards.