Holy smokes...just reading your signature...you've owned every major interchangeable lens platform haha...
Yeah, I think I get more enjoyment out of buying/selling systems than actually using them. Lol, or more of the trying to find the perfect camera. Lucky for me my wife is very understanding and I don't lose and sometimes make money on selling the equipment, especially since I often buy used at competitive prices from buyers looking to make a quick sale.
I think out of all the ones I've tried, I get the most enjoyment out of the E-M5 with a few nitpicks. Most of the others have issues that I couldn't live with. Either too big/heavy (D600/5D), too slow/laggy (XE-1, EOS-M), not often native glass (NEX's), too much noise (NEX7), too uncomfortable to use (RX100), or just too expensive/not flexible enough (RX1/E-P5).
The nitpicks I had with the E-M5 (too small without grip, buttons too small, VF still not great, bracketing took at least 12 button presses, etc) have been answered in the E-M1. Great, comfortable grip, improve buttons, Class leading EVF, simple bracketing combined with features that are just an added bonus (1/8000 shutter, improved weather sealing, color creator, photo story mode for the wife), make it seem like it'll be a winner and could be the one that stays in the bag for the longest. Plus it doesn't hurt that I'll be able to inherit some quality 4/3 glass like the 2 macros, and some other HG and have access to some SHG glass. As much as the Oly 60 was a sharp lens, at 120mm equivalent, it was a little too long for me, having a 70/100 equivalent will be better for me.