I love photography, and have a Nikon DSLR and a high end digital compact. I also have a bunch of analog rangefinders (mostly Soviet ones such as a Kiev, some Zorkis and FEDs and a MF Moskva).
I love them all, but the one i use the most is my iPhone (for everyday snapshots), and my favourite by far is an old Lomo Smena without rangefinder.
To me, even though I know that my DSLR will give the best technical quality, I find it much more interresting to use the completely manual Smena (most often loaded with Tri-X). Not only do I prefer the grainy analog feeling of analog B/W film, but I also prefer the process. It slows me down, it forces me to think before the shutter is pressed, and there is something almost magical about the development process. All in all, this tends to make me a better photographer with the Lomo and the rangefinders than with the DSLR.
But mostly, to me, it makes the whole process more fun!