I believe that people think they are paying you a compliment when they ask you to do a commission for them. It doesn’t often feel like one.
It usually goes like this. People come and see your work at a gallery or at your studio and ask about you doing a commission for them. Basically what they’re saying is:
‘I really like your work, just not these. These already exist and weren’t done for me and only me, so I’d like you to grovel and be extra nice to me while I jerk you around about the possibility of you doing a commission for me which really won’t happen because I’m really just jerking you around. Sound good?’