Overall I was happy with the license conditions...

See, I don't know. I sort of understand the appeal of having a one-sentence license you can just give people, but at the same time I like attribution, and the WTFPL doesn't offer that. In fact, it explicitly gives it away. Are people allowed to take my work and pretend its theirs? I don't know. I'm guessing it depends on the legal system. I definitely don't like that.

It's not like BSD or MIT licenses are much longer (and the size of my LICENSE file doesn't keep me up at night). And "you can do WTF you want" is about as short as "it's MIT-licensed", and carries almost the same meaning.