I use a tablet at work and a mouse at home and I’d say that the tablet is much better / easier to use for all aspects to VFX, especially roto’ (but not so much to navigating explorer / finder!). I have an Intuos 4 so I’ve set up the buttons on it for certain commands such as ‘select all’, shift, alt, new spline and so on so I can get away with not really using the keyboard at all.
I’ve found that regular knuckle cracking and wrist stretching are important! though I don’t roto all day.
RB