Hi,
I have a canon 5D mk1 and happy with except when it comes to lack of live view and the LCD quality.
Mostly I shoot landscapes, but I like macro, or close-up nature details i.e. leafs with dew, mushrooms, detail on trees, flowers...
Right now, I have a 15mm 2.8, a 17-40mm 4l, a 35mm 1.4L...