Probably Hank Green. The first time we ever talked was me emailing him and asking him to parody himself in a video about videos that had recently been on the front page. We didn't know each other at all, but I had watched a few vlogbrothers videos and felt like I knew his online persona pretty well at that point. So I wrote a script for the collab video and he said, "yes, I'll do this, but only because this script is great, it sounds like something I'd actually say!" Neither of us knew it, but it was the start of what would be a long and fruitful friendship. <3