How did I miss this thread???
On the track left or right, no difference. That said, on some corners I am better than others. Off camber is tough, dual apex can be tough too because you want to follow the track and not the arcing line through both apex's. But that is the fun of the track, figuring out the puzzle and putting it all together. Once you figure out a turn it is the most rewarding feeling!
On the street, like a canyon, I feel more comfortable in a right hander. The reason being I apex on the white line (inside away from on coming traffic), where as a left corner I apex on the yellow line, leaning towards traffic.
Low speed turns can be very tough. I've found that if you lean the bike in deep, while you are leaning the opposite way, you can make a sharp low speed turn. They do take practice. The book Total Control has a great sequence of photos on how to do this.