I really don't enjoy PVP, and pretty much only play it when I need to complete a step on an exotic bounty. Despite this I'm a firm believer that custom games should eventually be implemented (though like many have stated, I don't think a lot of people realize what is required to do this on an always online game.) This type of variety would extend the game play by leaps and bounds. Especially if they added a few cooperative horde-like modes into the custom games so it would cater to both PVP and PVE alike.