Everybody loves to draw ampersands, right? You can have fun with the tail of the Q. And a lower case a, easy or difficult, is probably one of the purer examples of a typeface's character. But some glyphs are just a drag. My own pet peeve is the radical; it's seldom used in most typefaces, and it never looks nice to me. I always put it off to last. What do you hate to draw?