Looks like you about have a shop full, with just enought organization to look good and enough disorganization that people will believe you really use it. Good to see an AC in there, one tip would be to put some more filter in front of the AC. In my old shop I had a window AC that stayed choked on fine dust even though I had a weak DC and the stock filter on there. I built a frame to hold two sandwiched AC filters in stock size from one of the box stores (12x20x1 I think). I first put in a really fine filter designed for people allergic to airborne dust then one of those regular blue fiber ones in front of that. I would often vacumn the front filter and less ofter clean the finer one in back of the sandwich. Wasn't very pretty but sure saved that AC from choking.
One question- what is the ceiling covered with?