So this thread is still alive? It's been quite a few years, so now it's simpler for me to list the 9 countries I haven't been to (and why):
1 Syria (not a good time to visit)
2 Yemen (not a good time to visit)
3 Pakistan (a bit hesitant)
4 Mali (I want to visit Timbuktu but it's currently no-go)
5 Niger (not a good time to visit)
6 Burkina Faso (probably OK except near the borders with Mali and Niger)
7 Papua New Guinea (I'm set to visit the Mt. Hagen sing-sing festival later this year)
8 Dominica (waiting for them to repair hurricane damage)
9 Bahamas (saving for last since I'm fairly sure I'd be the only person in the world ever to have visited every country except the Bahamas)
Hopefully the rest of the posters on this thread have made progress in the years since the first post.