LiveJournal: although I have 5-6 stories posted there, I still cannot manage ity myself, and need the help of someone sitting next to me, which only happerns aboiut once every two weeks. My own Live Journal stuff looks a bit cramped, and you cannot see how many "hits" your work is getting--although a "hit" may just mean that someone turned idly to it, and may have taken oine look, and immediately gone on to something else. You DO get this on fanfiction, and, personally, I count 606 hits as more than 135...hoiwever many people actually read each piece.
About the switchero--which you have to do on fanfiction if you want to change ANYTHING--even a comma!--if you keep your document in good shape, it takes a total of about 5 minutes to switch your new document, with the corrected word or phrase, for the old. I recently kept worrying a story till I had it down to almost no time at all.
Of course, on Live Journal, you can edit RIGHT ON THE LIVE JOURNAL PAGE, which is a true blessing. Now, if I could only figure out how to post my dumb stuff on LiveJournal so that it looks the way marakeshsparrow's or louisev's do--it'd be great. Unfortunately, the quality probably wouldn't improve, but you can't have everything!
Ideally, I'd like to use both..