This list contains three of my top ten B/J fictions overall and the fourth is equally good. I guess I'm a fan of reunion fictions, too :)
What attracts me to reunion fictions is that Brian and Justin meet again after they've both undergone growth and experiences that have made them more confident 1)that they really want each other; 2)that the other things they want - and can have - are not a real obstacle to being with each other. They have clarified to themselves what is really important and therefore they can and want to be togeher.
Plus, I find the angst of the separation painfully delicious, because I'm a bit of a angst-whore when it's emotionally and psychologically well-motivated.