I would've went to Gai's team had Neji not been there as I don't think I'd get along with him (or Sasuke either had I went to Kakashi's team). Mainly I would go because of Lee because when you are around people who work hard you tend to work harder yourself. TenTen seems cool but I'm neutral to her.

So anyway I picked Kurenai's team. Seems very well balanced with eyes (Hinata), ears (Shino), and nose (Kiba). Plus they all got very different personalities so it'd be fun to be in a group like that.