most of my planes i leave as is, but on the Cougar and Capiche i've set expo to give a better curve for Hanging/smooth pattern flight, simply start the engine, goto expo ch3 and play with it and the throttle stick until you get the kinda of responce you want from the engine.
you can aslo play with where the servo arm is, the less the angle from snake to arm, the more the arm moves for the same snake movement. you get most movement at 90 degrees of course. if you set the arm so at idle most movement is from almost 180 ( or 0 ) degrees towards 90. using ball links allows you to get the links over the arm as it travels over the servo. in most cases the idle would have the servo arm facing at the rear abut 160-170 degrees from the snake, throttle cut is just that extra little bit up to 180. you should hit full throttle by the time you get to 90 degrees, or at most 70.

hope that makes sense, if not i'll draw up a picy