Semi-Anarchy, as the use of exploit clients or xray is not permitted, but griefing, stealing, rk, ect, is allowed.
With a world border of 10,000, to keep players in a general area for now, you will never run out of interaction and fighting if that is what you seek.
There are many goals of RegionMC, which you have full control of. You could start a faction, make it official and keep yourself in power. Get some friends or a faction and create cities, protecting said city from people who want to bring you down. Create allies, interlock cities, create maps and trade routes. Get rich with the in game currency of gold, powered by a plugin. Become a nomad, creating a secret base and protecting your gold from others. Become a trader, collecting rare custom enchantments and selling them to others. Make friends, or enemies, within RegionMC and see how it all turns out.
