I've started mixing it up. I know what you mean-- I wish there was a way (without logging out) I could filter those out while I read through the blog. I kept them for posterity's sake, but come to think it's not really a good format anyway, and it only posts RTs and things I write directly, but not replies, and some of my most interesting tweets happen through replies. Or replies I strategically type in front of so they show up in other people's feeds anyway. If you look at the "My Tweets" entry for the LAST day (noon March 1 to noon March 2) there is, for example, no trace of my long freaking out and other such reactions to Martin Freeman doing a Twitter Q&A, because it was all technically done in "Replies" to @TheHobbitMovie, and that was pretty much the Twitter HIGHLIGHT of that time period. But there ARE bunches of RTs that are not particularly exciting to posterity (particularly the ones that get cut off before the punchline), so really. I'm sure there's a better way to archive Twitter.