I have been really struggling to get constructive criticism with my work, from every avenue I try. Not sure if it is because my work isn't good enough to even critique, if it is because it is sculptural, or if folks are afraid to hurt my feelings (I am, after all, a very new artist). My husband is also an artist, and has helped me quite a bit, but sometimes hearing it from a spouse is NOT appropriate, haha.
Any way, I agree with the need to have your artwork (or ANY work) critiqued for personal/professional growth. Finding a person with both the know-how and the tact to get the point across can be tricky, though!