I find the Axis units to me more interesting and better at their job of killing stuff with minimal effort.
To define interesting - their units have neato abilities that tend to be completely void on Allied units. Falls, Arty Officer, Command PiV etc.
I can say Allies have pretty cool/interesting units too. Paratroopers, Pathfinders(bars), Guards, Soviet 2 man sniper squad, T-70(best light tank imo), Kats, Sherman (best medium imo). I don't know, I just think mainline infantry for Allies are just blah.