I'd love to see more people back here as well. Tumblr is fun and all, but I always felt like LJ gives a fandom a real community feel. It's much easier to interact with a lot of people at once here. And it's so easy to miss stuff on Tumblr if you're not following the right blogs or tags. (On the other hand, it also makes it easier to avoid wank....)

But given the changes that LJ has made, not to mention what they'll be doing soon (http://twissie.livejournal.com/595181.html), it's driving a lot of people off the site.