The worst type of interview question is the "you either know it or you don't" type. There's some special trick to solving it, and it's so overused that half the people being interviewed have heard it before. The "blender" one here is an example -- I've heard it a couple of times before, but I've never thought of a good solution... I guess I'm not sufficiently familiar with blender design. Is it a good move just to wrap myself around the blade shaft?
"Using a scale of 1 to 10, rate yourself on how weird you are.": You could tell a lot about a person (especially a person straight out of college) by their answer to this one. Not sure what I'd give myself. Maybe a 2 pi.
"Explain to me what has happened in this country during the last 10 years." -- sounds like a silly question, but wow you're going to be able to find out a lot about a person's world view by the way they answer that.
"If you could be any superhero, which one would you be?" -- this I don't like. It makes me feel like I'm being interviewed by a nine-year-old. Also, is it too obvious to say Batman? Probably.
"What is your fastball?" -- What? Is this a baseball thing?