I only got into it recently. I originally just wanted the caffeine to help me stay up while working late into the night, but it's been growing on me, and I think I'm on the verge of making a habit out of it. I don't like the rebound from the caffeine so much, though - it's ra drug just like any other. I don't really think it's healthy, but right now I'm just going with it.
Do you drink coffee? And if so, how much/often?