I've worn overalls. I used to have hair down to my arse (that's how we non yankistanians say it) which would get in the way. I once played in a giant, fluffy Koala suit (how aussie is that), and now when I get on stage I have a tendancy to wear knee-high rainbow socks and gel my hair into stupid styles. You've got to look your best.
I read an interview with Joey Jordison of Slipknot recently where he admitted that after their first ever show with the masks on, they were all wondering what hell they had gotten themselves in for.