I'll vote for ANY combination of settings that lets Sis be himself, teaches me things that I might like to try out in my Monarch games, and also sees some Navy SEAL/Mall of America action.
I am SURE I will see how to leverage the Lincoln traits, but I am also sure that a charasmatic leader will lead to some serious mid-evil butt-whippings. That is fine with me, but the best thing to do once that happens it to keep rolling until the fat lady sings.
I guess the first question would be Sisiutil, what settings do you think might keep you in check?
If you aren't sure, how about normal sized map, low sea level, 4 or 5 custom continents, 9 civs? You'll either have your own continent, or maybe share one with 1-2 other (soon to be extinct) civs. As long as you promise not to go for a pre-1950 cultural victory or AP victory, that should see at least one intercontinental invasion. If I'm right about that, it would also give us a look at some of the impact of 3.17.