Yes. Once it clicked it was so engrossing I found I could think of nothing else. Focusing on work was difficult. Dwarf Therapist became indispensable. I knew all of my dwarfs by name, and I had a plan for all of them. My focus became all consuming. I built a windowed tower that could only be comprehensible if you grokked the Z-layer system. I was very close to having a moat filled with lava. In the end, I dug too deep.

I don't allow myself to play DF any more. It's just too good.