And it is. First time you see someone you figure, "hey she's good looking I like her!", then after you get to know her you're like "man, not my type; she doesn't have the kind of personality I like". It's instinctively looks that would appeal to us more than the personality; obviously interacting with someone that is good-looking would be more appealing to one that is not-so-good-looking. However, you need to make a trade-off between looks and personality at the same time to get the one you really do like. Yes, a girl that you think is really hawt and she thinks so too is awesome, but if you cannot connect and actually have a good time with her, then she's not the right one for you.
Not always the case, as sometimes when a person helps you, and they be uglier then well... I don't even need to emphasize on that. But you see right away they are kind person, so you like them.
Personality is more important if you are looking to date them for more than a week. but if you just think someone is really goodlooking and don't want anyone else to get to them they it is worth a chance of them having an annoying personality
About 80 percent of all information we collect about another person will be through our eyes. It is not something you control, you will be more biased towards having one opinion about a person judging by their looks, their body language, expression and so on, than you will ever be by "getting to know her".
Anyway, on a more "we have to discuss this, because I ttly took her for her brains, not her boobs" note, I will just say: Kittens or puppies.
Looks. Anyone who says otherwise is a d***ed liar. If I see a good looking chick I'm going to go over and see what happens. If she has a good personality, that's a plus. If I see an ugly chick, I'm not going to over thinking, 'well she probably is nice on the inside'. Harsh but undoubtedly true.
Have you ever had that strange feeling... "I don't even want to think about speaking with this person" It comes from body language; and it never let me down, if someone SEEMS an asshole, 98% it is. So, for your answer: BOTH.