Very consistently funny! Not for little kids. Fontains a significant amount of adult humor, without going overboard. Myself and the wife are in engineering and the sciences and find the humor hilarious.
As a disclaimer we are currently halfway through the second season.
Love Big Bang Theory. This is one show my wife and can get my 17 year old son to sit down and watch with us. We all laugh at the antics of the characters. Lighthearted and easy to watch.