I've been riding since 1967 (no jokes about my age, or I will be forced to remind you of what your mothers looked like 42 years ago
). Started out with dirt bikes, then an old ironhead, then a couple of Dynas and finally a Geezer glide. That being said, I did not take the course until 2002 or so. Quite surprisingly, I learned some stuff from the course. My slow speed manuvers are much, much better now.
Old habits die hard.....a few days ago I was heading home from Fallon. Clear, warm and relatively traffic free. About a quarter mile ahead of me I saw a small car turn off the road. Sure enough, I saw his front wheels turn towards me. Backed off on the throttle and sure as sheiiiiit, he made a u-turn across four lanes of traffice. Gotta assume that everything out there has the potential to kill you. Plan your escape route.
That being said, and to echo what others have said....take the course and don't be the turd who gets written up because of bad gouge from a buddy.