Not only do we have a sense of humor but some of us actually get Monty Python, Benny Hill and Dave Allen at Large humor.
Benny Hill sadly is the lowest sort lol.
I'd recommend Blackadder as well especially the ones set in the First World War, if you haven't seen the ending it's quite a shock.
If you are going to have tenets up on your walls, a sense of humour must come up pretty high on the list. If you can laugh at yourself you will never be too full of pride, if you can laugh at fate too you're much more likely to go through life as a pleasant person to know and train with.
In my job a sense of humour is a must and is recognised as such by our employers, it will come up time and time again throughout training and is even mentioned on the job interview.