I am finding that Disqus style comments are increasingly out of step on Tumblr. The overwhelming majority of interaction here is native Tumblr reposting, likes, and replies.
If you are a Tumblr non-user, I suggest you get an account and try it. Here’s a post where I describe how rich the ‘inside view’ is at Tumblr.
If you’d like to chat with me about something posted here you can try @stoweboyd on Twitter, click on the ‘contact me’ or ‘ask me anything’ in the right hand margin.