This isn't a game v game thread btw!
For example the mob tagging and material nodes in GW2 is perfect. It's impossible to steal kills or nodes in GW2, because of this players aren't discouraged to help each other because each player gets an equal share of loot. This creates a friendlier and more cooperative community, example if you die in GW2 or attacking a powerful mob you're guaranteed somebody will help. I realized the importance of this the other day when me and a friend was battling a rare elite, two others appeared but didn't help, they saw us losing and instead waited for us to die so they could take the kill for themselves... I genuinely believe if Blizz made all mobs like those rares on Timeless then I genuinely believe the WoW community would become more helpful and pleasant