[quote=@SepticGentleman]
<Snipped quote by JunkMail>

Existing.
[/quote]

Real talk tho most of them are really well-developed. They don't act that differently from, say, some particularly gung-ho soldiers who go across the ocean to take out "the bad guys". That said, the weakest one personality-wise is definitely Francisco, who has no reason to be in SG other than the fact that he likes killing people.