I'm signing up for a physics course that is rarely offered, and I have 2 choices for professors. One is ideal, great teacher, class is waitlisted. The other is notorious for being difficult, but really knows his stuff. There are 3 people on the waitlist, and I can only register for one of the classes. Think it's worth getting waitlisted in hopes I can get in? I'm going to talk to the professor today if I can track him down and try to get in, or ask the likelihood of being allowed to stay if I just show up. What would you do?