Have you ever seen the episode of Cheers in which Cliff goes on Jeopardy? Part of the the gag is that the categories are right up his alley (Beer, Famous Mothers, US Postal Service, etc.). Norm remarks that it is Cliff's "dream board" or something to that effect. At the end of Double Jeopardy he has a ridiculous lead on the other players, but he wagers it all and loses in Final Jeopardy.
So what categories would be on your "dream board"? Or, in the tradition of the 'innuendo' threads, guess what the dream categories would be for some of the other users.
World War II
Aviation (of course)