My sister quilts to help her deal with some nervous, emotional problems. We take her work to craft shows and most people ooh and aah over it, but when they find out the cost they become insulting. (She charges $150 for a full sized quilt) That's when I feel bad for her and sometimes think we need to stop taking them to shows. Back to your question though, I don't think you have to feel guilting that you don't like it. Either don't say anything or praise them for the amount of work and effort that went into the project.