I know we aren't all 100% pure Pentaxians here, so fess up. What other cameras do you use?
I have too many to remember, but here is a partial list of ones I enjoy:
Crown Graphic 4x5
Everybody needs a large format rig. Haven't shot this in a long time but I really need to. There's something magical about watching your image on such a giant screen.
Olympus OM2
Probably the best handling manual focus film SLR ever built. Great autoexposure mode (aperture priority) with off-the-film-surface metering, small and built like a tank, and the great Zuiko glass. Have only one lens--a 50/1.8--but it's really all I need. It's a lot of fun popping some nice color film (Kodak Supra 100 for me) in and going shooting classical style sometimes.
Yashica-Mat 124G
Doesn't see much use, and it's a bloody shame. The Yashikor lens(es) on this camera is so sweet, and for a TLR it's light and nimble.
Fuji GA645
The ultimate point-and-shoot if you ask me. 6x4.5 negatives, autofocus, huge and bright viewfinder with parallax corrected brightlines. Can be run in full auto mode, aperture priority, or manual. Fantastic 60mm f/4 lens. Some samples of its performance can be seen in Dante Stella's Mamiya 6 review:
Dante Stella Leica IIf
I had a III and some more lenses and viewfinders, but settled on this setup: IIf with a ~1936 uncoated 50/2 Summar. Images doesn't get more classic looking than this.
Mamiya RB67
The beast! Complete with 90mm and 250mm lenses. Rotating 6x7 back, centrifugal mirror slowdown mechanism to practically eliminate mirror slap (you can shoot at like 1/60th with this thing, try that with a Pentax 67!), will probably survive a nuclear war. Great optics, and a ton of annoying interlocks/safeties that all have to be JUST RIGHT for it to fire the shutter. Every time I bring it out it's ten minutes of fiddling to figure out what I forgot this time.
Those are the main ones. I also sit on a couple of Spotmatics, a Mamiya SLR, some miscellanous rangefinders (Yashicas and Minoltas), some point and shoots, a Nikon F... and a bunch more.
How 'bout you?