I am a Pentaxian, with an LX and a few M-series primes.
The only other camera from another manufacturer that I have that I love is my Minolta SRT-200. I have a few other SLRs from other companies: Olympus OM-PC, Nikon FG, etc., I'm in the process of selling them all to use the Pentax LX exclusively. I love the camera's size, features, and the lenses. I'm also building a 4x5 outfit so the money raised in selling the other equipment will help fund that venture.