yes. looks draw you in. secretly, we are all attracted to different people first and formost based on looks. once you figure out that the attraction is there, that's when personality comes into play. No all people find the same person attractive, which is a good thing in a way right?
First impression are mostly based on looks and body language (sometimes)..
If I see someone (no one in particular) and I see how he/she approaches their friends or a stranger before I approach them (Vice versa) then that may count as a first impression to me because that may be how they might come on to me too..
First impressions ARE looks. You can get an idea from a persons body language of what kind of behavior they have (outgoing, reserved, nice, cocky, etc.) But before that even happens, you see their looks. Looks happen quicker than analyzing their body language. So yeah, first impressions are looks based, nothing bad about it.