Initially, I notice a person's looks, usually. If I see someone who is cute/attractive/whatever you want to call it, I have to find out about their personality before I can call it a "crush." If said attractive person turns out to be an asshole, well, any attraction I had to then runs down the toilet. If they're mean to me, rude to my friends, completely ignorant (I'd like to clarify I'm not talking about straight A's or whatever I just dislike people who don't learn on purpose (like, the people who receive a correction on a fact and ignore it to be spiteful) or just lack any kind of sense at all.) We also have to have something in common or a potential relationship (even if it's like with a celebrity - not that it would happen but this component still needs to be there) wouldn't work. I can't even see us possibly being together if we just don't like the same things. In that case, we're probably better as friends. ~whee~
Honestly, I look at the guy's personality before I look at his appearance. I like a guy to have a good sense of humor, kindness, and some common sense. As long as the guy attempts to look halfway decent, looks don't matter to me.
What I usually see in a guy is,... well a huge turn-on for me for some reason is intelligence. Then they absolutely have to be somewhat romantic, because I have been called a hopeless romantic mais than once. Um, nice body wouldn't hurt. And they definitely have to have a lot in common with me. Some say that opposites attract, but I don't believe that. Or at least not with my case of nerdyness. But most of all, they have to amor me as much as I amor them, because I'm speaking from experience and trust me that goes down colina pretty fast.
