Baaaaaaaad. I don't drink caffeine at all, I don't have a very high tolerance for it and I don't really see the point of building one up when I'd probably only wind up addicted to it. One cup of coffee in the morning (no milk, four or five sugars at least) would be enough to have me bouncing around the house for the entire day, then it'd keep me up at night, then it'd make me feel horrible the next morning until I had another one. Rinse and repeat. I had a week at University during my first year where I experimented with caffeine when I was working a part-time weekend job, because I couldn't handle the 4am wake-up times. People thought I was drunk. It turns me into...not me.
Just the caffeine in soluble paracetomol is enough to set me off if I take it on an empty stomach...which I usually do, because my appetite is the first thing to go when I don't feel well.
So, no. No caffeine for me.