They will always be my favorite. Doomsday had me crying so hard. I don't know whose tears were worse, Rose's because they were so utterly devastating. Or Ten's because you could see how much he was trying not to, and the shock on his face when he couldn't finish.
Nine/Ten/Rose Fan Video. This is one of the most well-planned, well-timed, most amazing fan videos I've ever seen. The backwards progression through their timeline is absolutely fantastic! And the song choice? Perfection.