8 months that I have my 10D, and still learnin new tricks with it. As Colin said found it a bit tricky on exposure.
Also interesting is to learn new worflow for the editing, it's amazing how different results I could get from one shot edited differently on PS
I don't think It's possible to master photography, evrytime I go out I'm confronted to a new challenge of different ligths, angles, lenses capabilities, locations, people, events and I think that is the main point of interest for me
in photography. Digital has just brought an other dimension to it, but the essence is the same...
I would be doin something else If I knew everything about it. Learning keeps me moving forward ..