Just curious how many clients feel its only a good encounter when your chosen provider can finish?

This doesn't necessarily imply she is playing the Top, or at least not exclusively.

Am I correct in my thinking that on average, when choosing a provider as a Top that her ability to finish is an all-important aspect of your overall satisfaction? I.e. That it effectively completes the fantasy scenario.

Thoughts and observations?

I couldn't care less, and honestly don't understand why it would be important to anyone.  We're not making babies here, I don't want sperm all over me, and if she comes in a condom, who cares?  For me, it's a fantasy, being with a beautiful woman who's sexually available, and who also has a "surprise".  If she's hard, shapely, beautiful, friendly, and doesn't try to rush me out the door, I'm satisfied.