My submission to Project: Rooftop's Fantastic Four Fashion Forward! redesign contest.
I've never been a fan of the FF so much as a fan of the concept behind them... science heroes, as Alan Moore calls them in his books, have the potential to be the coolest in my mind. It's basically a license to do anything with the characters, after all - any and everything can be related to science.
So with the science hero idea in mind, I went back to the personality and background of each character: Sue and Reed are the only two serious scientists, while Ben and Johnny are more geared toward exploring, and possibly fighting. I wanted the suits to reflect that.
Hence Sue and Reed have the basic suits, a little more similar to lab coats than those of the other two. Ben doesn't require a full suit, at least certainly not for protection, and the top of his pants is styled after a wrestling champion's belt to emphasize his role, though I also felt it was important to bring in the blues in order to tie him in further with the rest of the team.
I was constantly forced to distance myself from the Mass Effect character designs, some of which are - for me, at least - the best sci-fi designs I've seen in a while. It's obvious that influences remain, but I tried to keep it to a minimum.