m4/3 made me fall for primes, while 4/3 showed me how zoom lenses are done (12-60 + 50-200).
I like the way m4/3's pace of growth now. Its exciting and it shows, most importantly, progress and innovation (no matter how incremental) which I felt was non existent way back when i started with the e510 up until the e30.
As for shopping, now is surely a good time to hope for a fat bonus LOL. I do not have the super 'I want that' feeling with the em1 that I had when the em5 is released so I'm not sure if I'll buy in. I've also tried the GH3 since i recommended it to a friend who is into video and my first impressions of the handling was wow i miss this grip, I'm using the em5 which for all intents and purposes is fine for me up until i touched a proper dslr form factor again. I still preferred he em5 over gh3 though.
Now the gx7, what a beauty (subjective) this will probably be the camera that I'll buy, if I will buy, because of two things - price and I have none of the ZD lenses already.
right now I'm a happy camper with the 9-18,12-50,17,45,75 + em5 and feel my wallet can weather this blizzard of temptations like a hibernating polar bear, stored with fat. I'll lose it when the 40-150 comes out though..
all that said I like the em1 and think its a step in the right direction for Oly (and the whole m4/3 + the now deceased 4/3), i hope they wont face more financial troubles along the way so they can keep up with the work.