You're missing out. I mean, I assume that you're doing other things with your time and enjoying them instead, but Dwarf Fortress is a unique experience well worth a few hours every couple of years.
A few hours every couple of years? I admire your discipline.
If I wait a couple of years to play, I end up losing a weekend or two to a few forts. I have to get my fix by spending a day or two every few months. No other game does that to me.
