For me, free motion quilting. To put so much of yourself into a quilt, regardless of your level (mine is between great beginner and almost, sorta, kinda, maybe a little intermediate. But to really finish off the quilt, that's my problem. I cannot get a binding that has ever worked out, so I had to figure out a new way to bind, but when you want to make your "special" quilt to really work, it needs the proper dressing. And sometimes top quilting is the key to really showing off your work. As i was told be a very exquisite quilter, practice, practive, practice. Any suggestions would be appreciated.