An MMO (can be F2P but has to be purely cosmetic) in which you can build houses/villages/castles/etc and attack other's buildings. Perhaps some PvP, tons of skills you may level up (think Runescape). A combat system like Dragon Nest/C9/Vindictus/etc, armor and stuff with the customization of Mabinogi (with different colors, the fact that different armors can give the same stats so there's variety), tons of different types of weapons/clothing/mounts that fit the style, no classes, skill tree, fantasy, one-of-a-kind weapons/armor/etc(so you can find a sword and only one exists in the whole game, obviously not extremely OP, maybe just a different look and it has special properties), large open world, nice graphics wouldn't hurt, updated regularly, has devs that listen to feedback and work with the players. That would by far be my favorite game to play.
