Nothing different Pilou.. 2d or 3d are only the media witch interprete your vision.
only some are finding the way for 2D interpretation of the space more easy and other by the 3D way..
and another.... nothing.. prefer to eat hamburger and drink a beer..
Otherwise about relaxation we have not the same view of that concept... copying something do by another by using a trace paper function in 3 mn is not my form of relaxation.
Finally, yes I will try to practice painting I must to improve myself in that non-familiar stuff.