I just saw this thing over at Cosmic Variance about the innocent guilty pleasures of academics. I can immediately tell you what my guildy pleasure is. Writing (fanwriting, that is). Especially blogging. It is non-productive, just for fun, and I often steal a few minutes of work time for it (like now). Bad work ethic? That's what I'm afraid of, although I hope that it's just making me a happier person who works better the rest of the time.
But as Peter at US/LHC blogs noted:
Life + Blogging = Const.
This means that the time has to be taken from somewhere. Well, at least I'm reading science blogs, right? I'm really working too.
But I'm scared of this.