i'm a fan. not a huge DOTA2 fan, i've played around with bots a little but no real games. i like watching and learning about the game and the culture that's sprung up around it. and i like brad and the matt's and their exchanges while they play. it's definitely a good second monitor filler.
i wrote a tl;dr blogpost about how DOTA2 is the new Magic: the Gathering if anyone is interested.