Oh, and I have a double horn, so I guess you could transpose both ways. (F/B flat)
@Insane: The only bad part about the french horn is you are shunned by all the trumpeteers. DX
@Olimar: Hmmm, let's see... From Ocarina of Time I would do Saria's Song, Song of Storms, Kakariko Village, and Zelda's theme.
From Pokemon, I could try- oh, what's it called? The Forest theme from Black/White. Whatever it's named. And then the Goldenrod City Theme from Silver.