He's pro-gun. That's the only reason I'd consider voting for him. He's clever, but he's a political showman, and has never took a serious position.
He's made some threatening statements - such as re-taking Alaska and re-uniting (taking over) some of former eastern republics. He also insulted Condi implying she should play the role of a whore.
Zhirinovsky is not a fool as some may think. Yes, he may say extreme and sometimes simply outrageous things, but looks like it's all part of his ugly guy image that sells not only in Russia but beyond. He is not a fool--he is great at playing one.