I love to have a bunch of games on my wishlist so I'm notified when they go on sale. However, to me, having all the different genres/gaming occations mixed together makes it incredibly hard to have an overview of the wishlist and I find myself deleting games from it, simply to manage the overview. It would also make it way easier to choose a new game to buy, if for example, I'm in the market for a new roguelike or maybe a new game for my nephew - to very different categories, I would have a much easier time choosing. I honestly think this would increase sales, at least I think it would for me.