Dead island
This game gets endless goodwill from me.
Before it I thought I hated first person melee combat in games and that it was always going to be garbage.
It worked pretty well in dead island and was enjoyable
edit: runescape too back in 2001-2005
full loot pking (wilderness added the risk reward aspect as well as the all important thrill of the hunt that is missing from almost all other mmo pvp)
unrestricted trading
player ran economy
almost everything was player made
real quests similar so singleplayer game ones with new areas, long storylines, meaningful exploration and great danger going into the unknown (losing all your items if you die)
Sure the combat was primitive, as were the graphics, but I always thought this was what future mmos would be (just with better graphics and better combat mechanics)
Instead we got kill 10 boars/pick 10 cabbages (for shame), walled garden economy that is controlled by the developer, heavily restricted trading, no real world pvp, factions, battlegrounds that remove the whole thrill of the hunt/chase aspect and no full loot pk as well as crafting being an aftertought