I leave projects unfinished all the time. When it's work though, I'm super speedy about it. I devote all my time to it, get it done quickly then realize that if I can do that in just a bit of time why don't I do something else? Then I realize I don't have to, and I get lazy. Unless i'm super mega bored. Then I do like three things that should take everyone else forever and then get bored promptly after. But at least I can't get yelled at, at work.