I loved Birthright. Eventhough I never got to play in that setting, I bought a bunch of the books because it had a very good feel to it.
For those that feel similarly, I really suggest you check out Kalamar from kenzerco.com. I think it has a similar feel as to the type of world it creates. The humans (and all races) are much more complex than the two dimensional they-are-all-the-same that most settings assume. While it does not particularly set you up as a ruler, it would not be that hard to make that the campaign focus. There is a *lot* of great information about the various kingdoms, their history, personalities, rulers, etc. etc.
Hope you can enjoy it as much as I do.
For those that feel similarly, I really suggest you check out Kalamar from kenzerco.com. I think it has a similar feel as to the type of world it creates. The humans (and all races) are much more complex than the two dimensional they-are-all-the-same that most settings assume. While it does not particularly set you up as a ruler, it would not be that hard to make that the campaign focus. There is a *lot* of great information about the various kingdoms, their history, personalities, rulers, etc. etc.
Hope you can enjoy it as much as I do.