[bombcar]

This is the key for me - DF is like Sim City or other building games (including Minecraft) - you have to be able to create your own goals. Sure, you can keep trying more and more difficult embark locations, but after awhile you'll have DF down well enough that you can survive 'indefinitely' on underground farms behind impenetrable walls.

So you begin to do other things, mega projects are a common one.