The trailer is pretty naff to be honest, and I don't think it would encourage anyone who wasn't already planning to see the show to go and watch it. Although I don't watch Doctor Who, I do like the mythos and pop culture behind it. I think Capaldi was a good choice; its nice to see an older doctor again.
I had watched a few episodes a couple of years ago, and it was cute...that's about the best I can say regarding Doctor Who. I have a lot of friends who are complete Whovians but I've never dug into the series. At least, not yet.