Just have to say- yes, my first DSLR, a K100DS. As others have stated, the backwards lens compatibility and built-in SR were what attracted me to the system from the onset.
I had learned on Canon gear in high school in the 80's (AE1), and had a Canon P&S. But when it came time to move to DSLR, The K100DS was exactly in my budget range.
I think I'll shoot this camera until the shutter dies- even then, I may see about getting it fixed! I love it to bits. Not knowing what I do now when I bought it, but I just love the decent ISO 800 performance, 1600 in a pinch with NR gives great results.
I won't even get into all the FUN I've had getting classic glass and outstanding results! A Katz-Eye later, and I have only purchased 1 AF lens. Just way too much fun to have these incredible lenses that I have come across for great deals!
The missing second dial doesn't hurt me that much- although I'd love to have it- but I find I've gotten pretty adept at menu flipping in a pinch.
The slow buffer, though, is annoying when shooting raw. But, I have to say, it takes away the chimp factor, and I tend to shoot more instead of eying every shot.
Fit is perfect for me, ergonomically- so, nope, I won't sell it, esp. at this point since it has a lot more value to me personally than the 200.00 I could get for it!
I consider it MY greatest camera ever..