Having the XKit installed will make things a lot easier. People reblogging w/o comments or simply liking will fold up and not repeat endlessly. Also, there's an Xkit feature that enables originals, only.

Yes, it's not like LJ and conversations are difficult. But because it's such a visual medium, it can be fun, holding complete conversations via screencaps.

Check out http://askeobard.tumblr.com/ - makes me smile all day long.

I don't know how vibrant the WC community is on Tumblr - I still follow Archivistsrock, but that's it. And my WC friends who are on Tumblr - but not because of WC, but because they are my friends.