Funny enough, I play DF while mining in EVE...
Joey, that seems terribly depressing for some reason.
EVE is the only game I know of that rewards you for
not playing. And the only game I know of where you can spend years infiltrating a "guild", only to steal all the money, kill the leader, and generally piss everyone off.
And back on topic, I did find Dwarf Fortress to have a cliff-like learning curve. I made around 12 fortresses before I even
built a forge. But that was the fun for me. Everyone died of starvation? Next fort will focus on learning food. Everyone died of goblins? Time I learned how to make a military. Tantrum spiral? Maybe I should make some bedrooms and some coffins next time. And it was all fun. I didn't even read the "Losing is fun!" line from the manual (didn't even know there was a manual) until pretty far into my run, but I still laughed when I forgot to leave that one tile space when I carve out my magma fortifications. Each successive fortress was spent learning a different part of the game, until it was inevitably destroyed. I then took what I learned and made one that lasted that much longer. I've made three fortresses that can survive a siege, and then fell to megabeasts. The last one I successfully trapped and trained a dragon, before dying to the inevitable tantrum spiral. I think I've finally learned pretty much all I need to know.
But the game does have some unnecessary difficulties, i.e. equipping a bone crossbow when a masterwork adamantium one is available, or having to lock a dwarf in a room to get him to make (or not make) things out of obsidian or bauxite. But many of these things seem to be fixed in DF2010, so I really can't complain.