Well.... azarah! Good Question!! But, I've got a different view on this! the bitter truth!! If you ask me... Are good looking girls perfect? then the answer is "NO", you are good looking doesn't mean that you are perfect.. there is much more to it!!
But if you ask me which one most guys prefer? The bitter truth is "Good Looking Grils"!! Guys try to suppress the fact that they aren't looking only for beauty but thats just to console themselves, but the reality is "A gorgeous girl would melt them like butter on a hot pan", You can't put the blame totally on guys, because that's their nature that's how it works... The more physical beauty you see in a girl more "adrenaline" rush a guy gets!! "And of course... light travels faster than sound"
So girls... you'll have to face it... MOST GUY'S 1st PRIORITY IS BEAUTY!!!
Because it's a gamble... Beautiful Girls may not have the perfect personality but that doesn't mean that just because you are beautiful you don't have a personality! So that's a risk most guys willing to take at the cost of Beauty!!!