You've discovered the Iterations Minecraft Server! Iterations is a Vanilla+ SMP built around the idea of "Minecraft and..." The core game stays close to vanilla, but it gets a lot more to work with through plugins and extra systems, so there's plenty here whether you want to build, trade, or go to war.
Towny lets you build up a city with other players, grow a community, and even choose your place in the bigger picture. If you want conflict, SiegeWar is there for that, but if not, you can also settle in and just enjoy the server your own way. Movecraft adds a whole other layer too, with airships and larger war machines for moving resources or making a serious impact.
There's a Survival world for roughing it out, and a Build world if you want to focus more on designing and creating. The economy is driven by players, with QuickShop and Jobs helping you earn money through normal gameplay and through trading what people actually need.
It all comes together with a helpful, welcoming community, plus vote and donor rewards, custom terrain, custom crafting, and BreweryX for a bit of extra flavor along the way.