It took me too long to figure this one out.
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As it turns out, that's not what I had to do at all. I have two or three players, depending on personal schedules, and they've got their own styles of play. I tried several different categories to help me understand them and bring a good game to the table. At first I thought it was FU that was letting me down. I think what I wanted from FU was a Burning Wheel experience with character development and challenged beliefs. FU doesn't do that. It can approximate it, but it'll never be Burning Wheel.
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What I have in my group is at least one player who wants the experience of the iconic character and one player who wants the experience of the dramatic character. I'm not sure what the third player wants, but I'll figure it out after another game session. When this penny dropped I immediately knew how to make the games more fun for all. I need to include elements of both in each game session, in order to let the players get enough of the experience that they want from the game.
And in the last game that's precisely what I did. And it worked.
Notes
1. I choose to believe that it was Robin who invented these categories, despite all evidence you may offer.