Loosely equates to how many cameras do you have....but, this question is directed at the real GAS addicts: How many complete camera systems do you maintan?
Rangefinder/Sony: Leica Monochrom for B&W and the all around badass factor, and Sony A7s for night streets. Overall use: street photography
Lenses: 12mm Voigtlander, 16-18-21 WATE, 28mm Summicron, 35mm Summincron, 50mm Summilux, 90mm Tele Elmarit
M4/3: Olympus E-M5 II for light travel, kids parties, telephoto. Overall use: light weight general purpose zoom.
Lenses: Oly 12-40 2.8, Panny 35-100 2.8, Panny 100-300mm, Panny 25mm 1.4
DSLR: Nikon D3x and 800E. For work. General purpose workhorse. I use this system when I can't afford to make a mistake or miss shots.
Lenses: Nikon 14-24 2.8, 28mm 1.8, 85mm 1.8, 24-70 2.8, 70-200 2.8
Medium Format: Rolleiflex HY6 for hobby, and in-studio portrait and products. I use this for fun, and for when I need to impress clients with professional gear, or for shoots where I can slow down.
Lenses: 50mm Schneider AFD 2.8, 80mm Xenotar AFD 2.8, 150mm Zeiss F4, 180mm Xenotar AFD 2.8, 250mm Zeiss
Technical Cam: Alpa SWA with 47mm xl. I use this for fun, and when I need the shift for wide angle architecture/interior. (currently can't afford other lenses! But I would only get ultra wides for the Alpa, as 50mm or longer my Rollei system can handle)
These two systems share a Leaf Aptus 12-ii digital back.
Handheld: Ricoh GR, a little rockstar that never leaves my pocket.
Film: Linhof 617S3 with 70 and 180mm. Hasselblad 503, Leica M2.
Flash: 4 speedlights
Tripod: Gitzo carbons (big and small), Linhof 3D, Manfrotto 405, and other Gitzo heads.