Something that I really enjoy doing whenever I have some time, is making 3D models and render them. It doesn't really matter what, but I find so fun all the process of creating the model, set up the composition, pick colours or material and render out some cool image.
In this case I modelled and rendered everything with Cinema 4D.
I experimented also with low-poly modelling and rendering, an activity that I found extremely fun and relaxing, almost contemplative.