Few check pilots & trainers in our airline suggest to keep it hands adjacent o the sidestick or tiller but not hold it firmly... Also in simple words be ready to take over like during side stick fault or tiller failure to take over.. also for rudders when docking in at the parking stand the F/O notices the right would not be completely clear & has to jump on the brakes to avoid damage.
But i do apologise if it dont make sense, as am just learning the ropes On the Bus..