in agreement with some other's post's...the first thing i do is go through whatever character i'm gonna use and reset the limits properly..knees and elbows do not flex side to side in real life for example so the first thing i do is turn on and set the limits so they can't move in impossible ways[double click on the dial in question]...and then try to limit the rest of the parameters to a normal range of motion in all the actual possible direction's that they really can move...with that done,you can still get bizarre and even unnatural looking poses...but at least you know something is just "off" somewhere else...you character won't have broken and dislocated bones,it just needs adjustment