Great thread! I love Robyn and Cody for their music and motivation and also Ally. Now I'm inspired to expand.
A good ride to try if you want to get a feel for other instructors is the July 4th one where a bunch of them switch off. Some may not like the constant switching of instructors, but I found that it kept me entertained, and I got somewhat of a feel for a bunch of them. I think they all ride for around 3-4 minutes. Only drawback for me was the music was July 4th themed which was kinda fun but some were a little strange.