I can't really think of a unique server concept, but I would like to see a Community City Build pop up some time eventually.
bomber man dm
Tropical Island RP (Lord of the Flies type thing. Probably wouldn't last too long but it would be fun, and it could be reset for different stories)WW2 Pacific TDMRP (This would also take place on an forrested island, but it has trenches and blast holes everywhere. There would be two teams, but they're far away, and there's not constant fighting. Teams would have to deal with supplies (Boats would give supplies) and they would organize attacks and such)
I can't think of a title.Players jump out of a platform with parachutes, while a plane tries to shoot 'em down. If they get to the ground, they can get into a vehicle and kill the enemy team, or blow up the enemy base.
Jeep Sumo wrestling.
I've always thought that some sort of Flood Survival (maybe Rp)thing would be great. It would be a sort of Bioshock/Portal-esque closed off area, in which the players have to outrun the rising water by climbing up stairs/platforming/improvising. There would be hallways in-between chambers, so if you come out of one chamber at the same time as the water, you drown.