Zero for me.
Only do 1 hr outcalls (or TDL's 75 minute special) to my home and hotels (if I'm on business). I'll live with the limitations this brings.... some places and SPs don't to outcalls at all, scheduling is much harder as fitting in a drive to my place is a hassle, etc..... I like the comfort of my own place, and not have to bother driving to an airport or downtown place, parking and such.
Maybe incalls aren't as bad as it seems, but I've never wanted to see an SP going to their hotel or condo. Just feels weird sitting in a place where that bed and bathroom has been used a tons of times. And who knows how clean the place is.