I had written a comment along those lines but I deleted it.. I'm a generous person by nature, in my personal life and as a SP, but I've realized that while some are appreciative, some people take advantage of it or start expecting it.
I have to take responsibility for my own actions too.. I can't really blame a client I've given a bunch of extra time for free to start expecting it, specially if he really enjoys seeing me. It can become hard setting that boundary without fearing losing the client.. I don't think I'm alone in this. Other SP, both indies and agency girls, have confided in me that they felt the same.
This doesn't mean clients should refuse a SP's generosity. I'm glad when I can make someone feel special

I just want it to be understood that this may not always be possible....