I don't mind favors for my Long-Term Favorites (LTVs), if they ask me well ahead of time--usually wine to set to mood or breakfast tacos for an after session snack. I do not like when someone I don't know asks for favor at last minute--Starbucks pickup comes to mind, and then rushes me out the door at our original stop time, not taking into account the 20 mins it took to get you the asked for goodies, just because you have another appointment in a few mins--you know who you are.
And some people ask me why I keep repeating with my LTFs... See above. My regular ladies totally rock my cock