Yeah, it seems like fan reaction is often pretty mixed (or negative) to the "first pics" of the individual heroes. Off the top of my head, the only ones I can remember getting an overly positive reaction would be Spider-Man (which is about perfect I think), Iron Man, and possibly Batman.
Like others have said, I usually wait until we see some more pics - or the costume in action - before I judge too harshly. I'm ok with some changes, as long as they don't get too wacky. Like Bill said, I think the Spidey movie costume was perfect - and it is something I really hope they keep (or at least keep close to) in the upcoming reboot.