I also have some sharpness issues with my regular digital camera which is squeezing out the fun of photographing. I still remember Italy 2004 when I for the first time held a real camera in my hands (pentax slr). I photographed anywhere and everywhere with that borrowed camera during the photo workshops in Italy. I loved it so much that I bought the exact same one some years later before my digital slr.
I'm going to try to take some shots with my pentax in March (I have a film in it, don't know how old) and if I still have the urge to get a Diana camera toward the end of the month then maybe I will as a late birthday gift for myself.