This is a bit random, but I was watching Conan and Dr Neil deGrasse Tyson was on. That guy is AMAZING! There is really nothing else to day! I watched Cosmos when it was on a while ago and was hooked! I love that he explains complex scientific concepts in a way that even kids can understand. Whilst doing a bit of google-ing I came across this blog post that sums it up.
I'm curious, who is your celebrity crush?