I pretty much do this myself now, and although I find myself working more than ever (in terms of both hours and productivity), I also feel better about my work

I pretty much do this myself now, and although I find myself working more than ever (in terms of both hours and productivity), I also feel better about my work life than I ever have. One caveat, though - 'only working when you feel like it' works best for me if I 'always work when I feel like it'. Which is to say, staying late when I'm in flow, and picking up my laptop when I get a good idea on the weekend, etc.