Hi there, I got an easy one:
When a spectator, I want to keep my altitude unless pressing the crouch or jump key, so if I just look up or down and push the move-forward (-backward) button I do not want my altitude to change.
Imo, this would make speccing (not to talk about video recording from demos) much smoother. Maybe a cg_specstrafemove 1 or something, defaulting to 0, to switch it on if required.