I use right button for rotate as well (i switch alt menu to scroll button). with the right button and tradition move keys set to directional pan, it gets pretty instictive after awhile.
another alternative is set the camera reset hotkey to an easy key, then use it frequently to center your camera, and just use the rotate. camera will still follow your character, and you can rotate at will to see whats going on. I'm so used to the movement keys to pan I don't even think about it.
On another note, there's a mod that allows you to tilt the camera, and it's pretty effective. Uses the scroll button by default. check it out at nexus (it may be on steam workshop too).