It would be nice if you could rotate structures along a specific axis when you're visualising them. Another software I use has this and I find it useful: if you hold 'x' while right clicking the structure it's only allowed to rotate along the X axis, and so on for 'y' and 'z'.
Maybe more people would find this useful as rotating structures can sometimes get out of hand (at least for me) and then I have to reset the view and start trying again to find the angle I want. I've found that "decomposing" the rotations by axis makes it much easier.
