A lot....the ones I actually fly....
AP Rigs: DJI S900 w/ GH4 (dual operator only), Inspire pro x5r , Phantom 2, 3DR Solo
Mapping Rigs: Custom fixed wing, Pelican (fixed wing), Inspire x3, couple waterproof quads, and the small guys from above
Fun: Loving the 4s Neato 180 set to full stupid, qav250 (still hanging on), pd130, tinywhoop (or 3), searching for my next 220 size right now
Retired:....I can't recall all the custom built ones - most flew for a bit - some I still have (F450, Tarot, and other stuff I can't recall)
yes I'm in therapy but it isn't helping...just end up building some for the therapist so we can fly during that hour (or two)....LOL