These are just some guesses on top of my head:
What personality types are your favourite streamers? Go!
Post what you're watching, whether it be video, still image or animation. The idea is to build a visual trove.
This is similar to the http://personalitycafe.com/intp-forum-thinkers/42237-what-you-listening-right-now.html thread. If it happens to be a music video you're listening to, it should...