Sleep and coffee are like my two best friends who don't get along with each other. They both keep me sane. They both keep me awake during the day. I love them both, but in different ways. It's unfortunate I can't have them both simultaneously, unless one day I learn to drink coffee while sleeping.
As a kid, I used to hate naps; I thought of it as a waste of daytime; (I could be playing instead). Now, as a father of two, it's all I want. Sleep is what refreshes my mind. If I get enough of it, the day goes by more smoothly because I'm more energetic, focused, and productive.
Coffee is sometimes considered my "life liquid." I do have a reputation among my peers of being a conscious coffee consumer. (I actually bring my French press to work.) I use it as a morning jump start, an afternoon boost, and an occasional treat.
Unfortunately, the more coffee I drink, the less sleep I can get and vice versa. Like all things in life, it's all about balance.