I don't handfly whole sectors but if a portion of the flight has some little trickier portions I try to handfly them raw data as often as possible depending on the captain on the flight. I fly the 737.
For instance tight DME arcs when there's a lot of wind, complex transitions with many letdowns having course and navaidchanges etc so I have to scan the approach plate as well, scanning simply instruments is not that stimulating. Otherwise I don't handily normal portions of the flight that I've been doing millions of time more than a few times a month. I'm busy fighting severe complacency
