Good question!!! I love everything about making a quilt...except the quilting. Go figure...LOL. My problem is: I know what quilting design I'd like for a quilt but I can't do it!! I have struggled with FMQ for a long time and just can't get the hang of it so I stick to simple straight stitches that I know I can do.
I think it depends on the quilt pattern what design you choose for the quilting. I've seen some gorgeous quilting (by long armer's) but sometimes it seems there is too much quilting on a piece. Every square inch seems to be covered. Maybe that's me, but I don't like everything covered.
I just finished a very simple fence rail for a friend of mine and would like to put some circles on it for the quilting because everything is so "square". I'm not sure how I would do that, but I think the quilting should add some interest to the quilt and not overwhelm it...IMHO :)