in breakthrough I like the change of setting as you progress, bridge-village-hills-aerodrome. It makes for some epic battles, brings me memories of BC2 rush maps. I wish they didnt fiddle around with the 5vs5 stuff and put some more effort to make the greek maps a bit bigger and varied as well
The thing I loved the most during our internal playtest was to see, as the defender, the attacker running down the hill to us. It looks awesome.