TBH, ATTRACTION is important, and it usually is affected by looks but looks might not be the sole factor. I can see that Brad Pitt and George Cloony are good looking per se but I am not attracted to them. I have been attracted to nerdy looking people because there's a quiet mystique about them. What usually attracts me to someone is a twinkle in the eye and a nice smile. I also like someone more if they show an interest in me, and i've heard this is quite universal.
I understand where you are coming from though, because I have a massive inferiority stemming from my PERCEPTION of my looks. I've had people make nasty comments about my features, mainly in school. But the ones who said that had a nasty agenda to make them feel better.
I think for guys, looks matter quite a lot, even if they don't want to admit it. Some girls think looks are important, the rest value security, affection, the attention they receive, and stimulation in the way of humour and intellect. Many girls won't want to go out with good looking guys, because most women are insecure that he will attract a lot of female attention and so might stray.