I think 6_28 has a point. Your server needs a differentiating twist. Whether a modded survival, Skyblock, towny or whatever, you need something that isn't quite the same as everyone else. Perhaps a unique story-line, adventure maps, games, etc. I would say, there needs to be a point or overarching theme. the mods and maps become a way to convey the idea...
My favorite by DinowCookie was tough. While they have a ton of amazing skins, I'm not a skin fan. (Perhaps because it's not my talent). But i actually like the Japanese base the best, followed by the guard tower.
