No AK here, yet, but they are tons of fun to shoot.
I like my russian SKS, and have been trying to decide between a vz-58 or a sig 556R for my next 7.62x39mm rifle. After I get one of those two, then I will be looking for a 5.45x39mm style ak to burn up some cheap ammo I would rather shoot then sell.

I had many AR's at one point and now only have one. While a great platform, it isn't my first choice. For 556 NATO, I like my Sig 556 and Robinson XCR much better, though it would be really hard to pick which I like better.