Do any of you use the paddle shifters regularly? Under what circumstances do you find them useful? Do you use the paddle shifters to "engine brake" the car while setting up for a turn? Is there any disadvantage to driving in "S" mode all the time (excluding fuel mileage)? If you want to have a little fun (for example, with a BMW), would you just put it in S and let the electronics handle the transmission, or would you manually control the shifts?