I think the biggest mistake someone can make when they single handedly create a game, is to set themselves a deadline. I know it kills me when I try to set one.
Adventure games, (to me), just look like they take alot of time and organisation. I don't have the artistic skills required or the ability to run a team. So if I want to make a adventure game I'd have to join a existing team. I think that's the best way to suceed.
By the way Alucard, I think your right. Life is a demanding mistress. That's the best thing about game design. You can drop away from reality, from life. She might be knocking at the door all night long, but nobody will be home. Infact, your half way to Peru by the time she busts open the door, knocks over all the precious china, trashes the furniture, throws out your mint condition star wars collectable figurines and screams out, " WHERE IS PUNY MAN!!!!!!!"