I know a lot of people beat up on season 5, but I prefer to remember how happy I was to find out that there was a season 5.
I watched Babylon 5 when it originally aired, but I was a kid with few sources of info, no cable, and no internet. As far as I knew, The Deconstruction of Falling Stars was the series finale. And while it's a fine little episode for what it is, it's a terrible way to close the series.
It was years later that I found out that B5 had moved to cable and got a fifth season plus some movies and a short lived sequel series. Seeing in the beginning was a treat, and while I found season 5 to be uneven, I was also thrilled to have more, and to see things wrap up. And then finally getting the real finale, it was a weight lifted from the deepest, nerdiest depths of my soul.