Round stuff
Continuing on the "circular motion" idea, I've always liked "round" stuff like the Honeywell round thermostat (they're little pieces of functional art on the wall), tires, wheels, coffee mugs (i collect those), agitators, front loader windows (not square), records, cds, round televisions (Zenith porthole, early BW and color roundies)
I also like roundish stuff like early 50s appliances, early GE fridges, Tappan doughboy, golden age jukeboxes, Seeburg 3W1 wallboxes (roundish top), Seeburg 100A-C, HF100J (the bandshell looking one), and the 200 select machine, Wurlitzer 1015 and it's clones.
Yes, I do love the sheer look (Frig WCI-58, Seeburg 222) but the roundie stuff is art. It's beauty.