I liked season 1 of Crash Course. I like season 2 better. Again, Richard Hammond's enthusiasm and self-depreciating humor as the host makes learning about these jobs fun. In addition, he's having a blast doing them. He doesn't make the whole thing come across as contrived like so many of our US-made TV shows do these days. There is editing, sure, but you feel like you are getting a real view of what it's like for a normal person to learn to do these things; complete with all the nervousness, excitement, uncertainty and laughter that comes with trying unusual tasks. The sense of fun is genuine, you watch and laugh with the guy.
Again, I'd put these shows in the same category as Dirty Jobs, or Mythbusters. So if you enjoy those, you will likely enjoy Crash Course season 2 as well.