Sprays on troll repellent
I want lots of skins. Also, I want to choose what skins I get. I want to be able to buy these things to customize my character. I would also like pets, cool portraits (based on achievements) and other fun stuff to customize the game. I love this game, and I would not mind spending a few dollars to support it while making my hero look unique.
Forget paid account boosts and all that. I just want to be able to customize my hero. I am a huge sucker for skins. Yes, it would require a micro-transaction system. But you could also do in-game currency that people can grind.
As most have pointed out, the drop rates for new cosmetic items is abysmal. Why not let us support the game and the artists?