I have one that I started a month ago, it's on it's third generation. I might have gotten distrated by some other challenges... haha! I do plan to go back to it! It's just after the initial "OMG No Money" and making sure my characters didnt' die from embarrassment I started to get a little bored, it was just like any other game.
That's what happens whenever I try to do the legacy challenge too. I always just get bored a couple of generations in!