In normal law, in roll, the 777 behaves pretty much like the 320, not having flown it... In a conventional airplane you might have to keep some aileron to maintain zero roll rate, depending on several effects, if you are climbing or descending, etc... FBW eliminates that and will tend to keep roll rate zero with neutral stick or yoke.
I regard the airbus as a "trimless" airplane, rather than an autotrim airplane. The reason being that the sidestick has no speed related feeling (it doesn't have to, since it is a path stable system and not speed stable). In the bus, we trim the airplane when we release the stick at the desired flight path. Even when the THS is jammed or unavailable we can still trim the airplane, with the sidestick, when in alternate law. Same applies to roll. It is like a roll autotrim. No need to keep stick deflection to maintain zero roll rate. Release to neutral and that is it.
In very nice to fly conventional airplanes, the pilot will only "intervene" with occasional slight push or pull forces in the stick, if the airplane is properly trimmed. input, trim, relax, slight deviation, small input, retrim if needed, etc... in both pitch and roll. In a not so nice to fly one you have to constantly make inputs, the airplane never seems to be in trim for longer than a few seconds. The airbus, and the 777 and 787 behave like the very nice to fly one.