Depending on the post, maybe none, maybe once, maybe a whole lot more. 95% of the time I just do the quick reply and move on. 4% will get a "once" if there's a picture or something I want to make sure is correct. 1% are long winded and probably more confusing than is necessary or I'm doing something funky like adding a table.
And then I go back and edit again anyway because I messed up something that spell check doesn't pick up on. Every post is re-read at least twice, though, and I still mess things up
