Before tumblr, I used LiveJournal a lot to read fic and fandom communities I was interested in. Everything was always "why so srs" "srs bsns" and to a good degree, still is. Not tumblr. On tumblr, I'm "reblogging" macros, rage comics, cat gifs, slash from my various fandoms (thor/loki, charles/eric, steve/tony, sylar/peter), fanart, gif spams, pic spams and everything else. You do that on your LJ, someone on your friends list is most likely to bitch at you.
I'm always on tumblr now. If you want to check out my tumblr and add me, you can find it at http://vickysfollowingyou.tumblr.com
For those who "don't get" tumblr or how to use it, here's an easy tutorial with lots of screen caps. http://vickyblueeyez.livejournal.com/136006.html
See you there