Eventually got the hang of the Rigify-Pitchipoy rig that ships with Blender. I'll use this one instead of mine XD
(I made mine with the intention to use it for animating but it was mostly to learn how to rig in Blender because I like having an idea of how to do everything, I am however not a rigger)
Please excuse the odd deformations, it's a low poly model and I didn't fix up the (pretty good) autoskinning as the intention was to test the rig. These folded arms are much better than my last folded arms and much easier!
Update: now with animation!