1) (re: quality of hotel) I place very little importance on the quality of the establishment as long as it's clean, comfortable, and discreet. It could be really flashy, or pretty basic, and I really wouldn't care too much.
2) (re: surcharge for hotel costs) I generally presume that the hotel cost is already factored into the rate. I expect that a provider will analyze her costs and balance the cost of acquiring a room (whether it's a hotel or a more-permanent incall) with the costs of traveling to see her clientele. I know this will vary from city to city, as some places are easy to travel in, and some places have comparatively higher rents and room rates. I also expect that different people will have different comfort levels with incall versus outcall, and may adjust their rates accordingly. It's her business, and she can set her rates as she sees fit, although if she only offers incall, I'd appreciate a rough idea of where it's located (and something a little more precise than "DC metropolitan area", please).
3) I typically stay in mid-range properties when I'm picking up the bill -- something in the Sheraton or Marriott is about right. However, if it's just a case of needing a place to sleep in the middle of driving from Point A to Point B, I'll take my cheapest clean option.
4) I generally prefer a home-type environment, but it isn't a strong preference. I do get a bit of a thrill from knowing that I'm having sex with a lady in her own kitchen or on her own sofa, and it's sometimes hard for us to arrange musical or video accompaniment in a hotel (although not impossible). (I have fond memories of watching "House of Ass 3" at a lady's house who enjoyed watching Sasha Grey just as much as I did. Yum!)
5) I do not ever invite anyone to my home. I've been known to get an outcall when traveling, especially if my transportation options change unexpectedly. However, if there's any chance that a visitor to my room could be discovered, I'll do the traveling.
6) I view donations in the local context. Here in the Baltimore/DC area, $300 is not unreasonable (although my own financial situation won't let me go much over $400 for an entire session). In someplace like Dallas, $300 as an hourly rate is way too high -- my best regular there charges $200, although I've seen some other Dallas ladies in the $225-250 range.
7) I personally prefer 60-90 minute appointments, although I've done a few longer ones (and even a few dinner dates). Much of my hobbying is done during the day, covered as "doctor's appointments" or something similar.
8) I'm generally looking for a more intense experience, and have absolutely no trouble with two, three, or even four rounds, if time allows. I'm a big fan of ladies who like to get the ball rolling in short order, though I've also been known to enjoy a more leisurely session sometimes, too.
9) I'd generally prefer to not do the BDSM stuff with an escort. While some degree of power exchange can be exhilarating, I get more into sensation-play, and things that might push the limits of consensuality for a compensated relationship. I wouldn't rule it out, but I wouldn't plan on it ever happening.
10) In general, I don't care for boob implants, but I also believe that ladies should do whatever makes them feel sexy.