Are the girls you target for a quick lay similar in looks to girls you enter a relationship with? For instance, are the girls you game for sex-only better looking than girls you enter a long-term relationship with? When it comes down to a fling, I'm assuming looks matter more than personality. Whereas in the relationship looks and personality matter (at least to most people).

I don't think there is a definite answer to this. I prefer good-looking women all around; a lot of people think that the "relationship type" are less good looking for some reason. I do believe it depends highly on the location; you can get a deeper bond emotionally in day-time places when woman have there guards down but get laid quicker at clubs/bars. For me, I go out during the day for pivots/friends/relationships/future-conquests and at night for the insta-lay.

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Just chill, it is what it is and nothing more until you give it meaning.

For me, the lay is directly exponential to the excitement of the chase.

the girl better be damn special in every way if I'm gonna start a relationship with her.

But I'd say it doesn't matter because you should start a relationship the same way... with a quick lay. I'm not saying you should date sluts of course... but don't make the mistake of taking your time with a girl because you really like her.

Personally I find when a girl is hitting on you hard, that it kinda turns me on - so sometimes I will take such girls home. So for me, looks matter less for a quick lay (still gotta be attractive obviously though). Also shit if a girl can really dance (and is good looking enough), wow I often will choose her over a hotter girl who is just standing around.