I tend to -- especially of the jewelry I make! I always feel like I'm leaving a friend at the post office or somebody's house or something when I sell/gift something.
I took a hiatus from custom work for a long time, but a couple of weeks ago, I made a tiara, necklace, and earrings for a wedding. I hated to give them up because I was so happy with how they came out! I even kind of secretly hoped the bride wouldn't like them so I could keep them for myself.