Actually, the best (for diversity) would be a tech/fantasy mix, wich is exactly what the Ultimate pack is made for. If we go for a full tech server, we'll not use thaumcraft, EE3, soulshards, Twilight forest, and even enchantements on tools and stuff. But there are cool mods, so i'm for a mix. as i said, the different countries.cities on the server should have different RPs, and technologies, with some more using techstuff and other magicstuff or a mix of different stuff. It'll force the player to travel to get some stuff, and he will be able to choose where to settle, by his "playstyle", going in a place where they use the same stuff as him.
I'm realising that those posts are really messy, but i can't find a way to make them better