As DD a work day may start any time, you are on call; it is good and sad news in the same time. Good because you get paid on each day you spend on the rig site. Sad because you have to leave what you were doing.
I learnt a lot about drilling different well types and profiles, manage my stress and work under harsh situations.
Management is one of the worst I have seen; managers have to be that way, as they were not given a chance too.
Co-workers depend on who you work with. You might work with someone once your life, but most of them are good.
The hardest part of the job is working overnight many days, manage to sleep in noise.
Most enjoyable part is when you get congrats on what you have done.