I've seen some great cosplay's, but I've also seen lots of awful ones! I think if you somewhat look like the character your portraying, then go for it otherwize it looks silly.. Well most of the time it looks silly anyway really, lol.
I apologize if these have already been posted!
These are some of my favourites:

This is just so cute!
This is probably the worst one I've seen, I was like omg when I first saw it! It' so revealing, ugh..

How does she go out like that??
