Unfortunately, I've played way too many MMOs to tell you about them all. Even Korean knockoffs of Knockoffs. I've played them all for about to max level and enjoyed them for what they were. Name it and I can tell you about it, their in game systems, and some tricks.
As for what I'm playing RIGHT NOW, I'm back on an old game UBISOFT canned ages ago called Shadowbane. Fullscale PVP, full bag loot when outside safe zones if you're murdered. Complete control over the economy and seige-able cities (called BANES) and a completely player driven war system it's very unique. However, some people can't deal with right click to move and no WASD. This an older game that was discontinued but they brought an emulated server back up better than ever. Here's a map of the world:
Each of those "Shields" with Heraldry you see is a player ran city or nation. There are hundreds more in-game on their evolving map that can be torn down, or replaced. Many nations and towns fight over those locations on the map, and since it's fullscale PVP it means anyone not you(or a guild friend) is a target. No remorse. Play. Crush. Conquer.
The GMS have little say in what goes on and it's mostly all player driven. Of course the GMS can ban/uphold rules, but they never interfere in general gameplay. I remember owning four cities when I played, two of which were trade cities and located two-and-two on Anderon (above) and Relloth. One was a guild city, for our nation, and my home base. The others were unaffiliated, ran by a non-guilded alt so they were 'neutral' shopping towns. Anybody can make a city, drop items in it, level it up. The beauty is there is so much space. Of course there's a limit to how many towns can be placed and occupy areas, but it's interesting to see how each one is designed (from the ground up) you place everything. I made four sets of outer walls on my trade city each with the highest HP wall sections I could find so I could last through sieges until my friends could get there to defend my city.
With the sheer number of races and classes, the game has no stale play. You want a two handed warrior? Bash some face in. Want a mage who can stealth? play a shade mage. You want a thief who can peek into bags and steal other peoples hard earned loot? Do it. I for one love Vampire Necromancers, and lifetapping the heck out of people/having a damage reduction cap shield on all times as to not suffer more than 10% of my health in one hit - to avoid ambushes.
No matter what you decide, the game is huge. The graphics ARE dated, but the gameplay is so fun you look past them. It may be point and click and hotkeys, but keep in mind the game is from like 2001+.