You are a lipid. You know whom you like and whom you hate, and you like hanging out with people who think like you do. People who disagree with you annoy you to no end. You either love Abercrombie and Fitch or you despise it, but there's no middle ground. You're polar.
Which Biological Molecule Are You? brought to you by Quizilla At the risk of seeming pedantic - perish the thought, eh? - your bog-standard lipids aren't polar at all. Membrane lipids have polar heads and long nonpolar legs. Hm. I think I'll be sphingomyelin. I've always liked that one.