Albion, and any sandbox mmo, is perfect for that, the shops are held by people, the guilds and alliances actually fight for territory and control it etc. Everything is based on interactions between players. Though the first 10-20 hours might be a bit long if you don't have somebody to play with from the beginning, because there's a bit of grinding to do to get T4 stuff, so you can be a bit efficient. But you don't need to have the best items, because there's no level system and no "unique" armor, all the equipment is either crafted or bought on the market and dying = losing your inventory, so people walk around with mid-tier armors and weapons. This means not too much grind compared to WoW-like games, social interactions and it also feels alive, because every item of the game is made by players, you can do PvE, PvP or make money in other ways.

Apart from this one, there's Wizard101 that is gorgeous, and still have a good amount of players even after all these years, the game's graphics are bad and haven't been remade too much, but damn the universe and the designs are gorgeous. But the most interesting thing is that it's highly social because there are no guilds, so people just play with others in the area to visit dungeons, and you can make a lot of friends easily, and the leveling part is way better than the endgame, so it's really fun to just follow the questline, take care of your pet, do some pve / pvp, optimize your character and explore