Path of Exile it's very fun and a lot of people quit D3 for it. They have pvp there end games are maps you pick up and you can like roll kind of to see what the maps will be like 50% more mob packs better loot drop 3x more bosses boss does 50% more dmg the harder the map you roll the my xp and loot you will get. It's only 10$ for a beta key but if you don't want to pay it will be out soon. The game isn't pay to win it has stuff you can buy but it's more chest spec and stuff like that.
Also POE GM's like feed back and they will even play with you. They are always hosting content like one week HM ladder race, pvp events, and my fav 1 hour cut throat you race to level but it's a free for all people can come in to your dungeon and gank you. You drop all you're gear and lose 40% xp
here is a video on that.