I would think flying would be pretty cool. You would be able to fly away from all your enemies and get where you're going much faster. But being invisible? You probably wouldn't use that for the good of man.
“I can't tell you how hard I worked the last year. In fact, I worked so hard that I know I can't maintain that same work level in 2001, so I've got to quit something.”
“I derive no pleasure from prosecuting a man, even though I know he's guilty; do you think I could sleep at night or look at myself in the mirror in the morning if I hounded an innocent man?”