i'd think its not the appearance that counts, its the approach that counts.
some have low maintenance, which you doesn't need to do much and will submit as long as you give enough attention to them. some have high maintenance which you need to splurge on them in order to stay in the game.

if outright your intention is to bed them, be prepared to be backfired. most of them are not outright open minded when it comes to casual sleep around.. even relationship they will think twice before jumping in. some might even have cold feet whenever they have insecure in their heart.