Well, guess it depends.
For people with good looks, its a lot easier to get the attention of other people and notice it-especially after a few drinks! Thing is, what is "good looking" varies per person. Personally, i hate this look that most people my age are going for now-these are the people that are classed as good looking a lot. Thats just a lil example to illustrate my above point!
Personality is also very important for me and many other people. I could never be with someone if they had the intelligence of a squashed apricot even if they were the most stunning person in the world. I can honestly say for me that personality is more important than than loks. I cant be the only one like that.
You just have to like yourself and that shows. Like a previous poster said- first impressions are based on looks-because you havnt seen the personality yet. If you go in and are happy with yourself people will notice and thats better looking than a person that may be considered insanely good looking that is not as confident. Your body language speaks a lot- if you show confident body signals people will notice.
Just try not to let it get to you too much. Do what you have to do to make yourself happy and you should see the results! Good luck!