Oh yes, I, too, sometimes end up spending a lot of time researching other words or other facts in addition those which made me interrupt writing. But I’m usually not in a hurry to return to my characters.

I agree. Concrit is important, but it can also be painful. I seem to forget how hard it was to receive any without feeling wounded and becoming too defensive. Now my beta points out only small, obvious errors and never suggests that I change anything bigger. And I don’t seriously look for or plan to start any concrit community. Nowadays it’s hard enough to get any more detailed feedback than kudos, let alone other than positive comments (or more detailed replies to detailed praise than "I’m glad you enjoyed it"). I don’t want to complain. It’s wonderful to see that some people have read my fic and some of them even left kudos.