I completely understand where you're coming from OP, especially when you're new to punting if you have a stunner naked and willing in front of you, you can start wondering where the catch is, or that it's too good to be true! A "girl next door" type can be good for the nerves.
That being said, I'd recommend you don't resign yourself to only using escorts that you think you could pull in real life. Fight out of your comfort zone and enjoy some babes! Reason 1: service is often unrelated to looks (and price). Some plain girls are surprisingly snotty and arrogant, and some really hot girls are more kind and down to earth than you might think. Reason 2: it's a paid service and your money is as good as anyone elses - why limit yourself!