My first post isn't anything spectacular, something about measuring the speed of the propogation of gravity. However looking at my earlier posts I cringe at how poor my ability to explain things used to be. I really have to credit this site and some of its members with improving my ability to communicate physics to others.
I've notice the improvement it has made to lectures and talks I've had to give. So if I ever manage to write my dream book of quantum mechanics for interested non-physicists there will be a few acknowledgements.