I know what you mean--I have a pretty standard drawing side-and-angle in my works, too. This year I set aside a special sketchbook in which I'm going to try and do dynamic posing. So, I've been looking in the old artbooks I have--from Michael Whelan's fantasy stuff to my anime artbooks--figuring out the skeletons of the poses used and trying to see how I can do emulating or modifying them for my characters. :)