5.45?
I have both an AKM and a 74. While I like the idea of the 7.62 x 39 round, it just is not that much fun for me to shoot. Sure, it is big, reliable, proven, etc., and really slams those steel targets, but I also have to have a good cheek weld or a day of shooting may give me AK cheek. Even Rob Ski uses that big after market muzzle brake to make those 5000 round torture tests easier. OTOH, the 5.45 is simply easy to deal with. I notice very little recoil or muzzle jump whether the brake is on or not (took it off several times just to see). The other comparison of the calibers that no one talks about much is the weight of full mags. Several full 7.62 mags are just heavy, especially the bombproof metal surplus ones. Everyone talks about getting an AKM for when the SHTF. Well, a SHTF ammo load of 7.62 is going to be a real load.
As I said, I have both and want to keep both. If I come across another AKM that I like, then I will have two of them. My point is just that for shooting enjoyment, I grab the 74 every time.