The discrepancy in attitudes about the job by providers. It seems you have two levels, the ladies that love their job, their clients, and look forward to making themselves and their customers happy. The other end is those that are really nothing more than machines that can't match the enthusiasm of most streetwalkers. There seems to be very little middle ground. There is, however, a great deal of consistency. If a provider is a "good one", you can almost ALWAYS count on that same level of attention. If they're bad, they ain't going to get any better.
No as far as a single session surprise???
That's easy. I called an agency in an un-named town because a cute blonde spinner type was listed but didn't show her face. When she arrived at my door she was the daughter of one of my best friends (and it's even more personal than that, but I won't go into that here).
I'd say that was pretty surprising.
Jack