I've used Wikipedia for about a decade now, and recently created an account so I could help out and make small corrections where necessary. I'm not a Wikipedia nolifer, but it's fair to say I use it quite a bit for background knowledge.
I can get pretty obsessed over a certain topic for a few days, so if you see minor changes to a set of very connected articles in conjunction with another from me, you know what I'm hyperfixated on this week.