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, 100mm 2.8 macro and an oldie 80-200mm 2.8L.
Been looking to at the ts-e 24mm and even the 17mm, against upgrading the body.
I really don't care for the video abilities of the mk2, as i have the lumix lx-3, and the small videos I shoot, are good enough for me - yes, it's just a hobbie, and mostly done while hiking or vacations.
I would like to hear your opinions, in special if you have done the upgrade from mk1 to 2 and/or own a ts-e lens - I really like the possibilties it can provide but wonder if it will be too much of a specialized camera, as I normally hike out with only two lens