Rabbit Holes

So after testing a card game I made I've discovered that my biggest problem is that I go down rabbit holes WAAAY too deep. I end up focusing on certain aspects of a game than the game as a whole. So from now on I'm going to try to simplify my ideas and see if I can't improve on them. Then I'll add the extra stuff. I wonder if this is why the Fable series sucks so much.