Yup, I'm an art-gineer (programmer for our propreitary software + general maya/flash/photoshop slave). And no coffee
I ususally have a good natural high to keep me going. Coffee is just my super-mega-backup-emergency route.
Funniest thing of all, I tried to sleep last night, wound up programming on a lot of my personal projects, reworking how my char will be endgame (I documented out all levels, skill points, etc, LOL), did some more development on a number of projects I'm doing for NWN . . . that was an abnormally productive night. I think I blinked for about two hours (if that can be called sleep LOL).
And played and beat a game of nethack . . . in turbo!
Now I'm having my "cooling off" syndrome - feeling unnaturally twitchy, eyes a little dry and bugged out, and a desire to sleep in about a week.