Painting.
Painting has always been one of the most enjoyable things about my hobby, but for quite a while I've struggled to get my head back in to my "painting mindset". I'm now taking some steps forwards with this by doing little bits on three different painting projects, a Heresy era Terminator Praetor, a Vindicare Assassin and my Imperial Knights. I'm also reading a lot of hobby blogs at the moment, looking at what my fellow hobbyists are painting or making is very interesting and in turn helps inspire me.
