First thread, first priority: itch specific API functionality. What do I mean by that? Well, Steam's got Steamworks, and Steamworks is cool. It's got Achievements, Leaderboards, Multiplayer Invites, etc. What are some things we want that could be unique to itch?
My idea would be some kind of metagame, like an actual trading card game. Each game you own gets one card, and we could actually play each other, not just sell the cards. Then maybe we can even loop achievements into the cards somehow? Like the more you accomplish in a game, the more you power up its card? Kinda more like Pokemon than Magic, I guess.
Maybe even bundles could have unique cards too, with all games in the bundle tying into a card's stats. Or maybe bundles are like one-time-use spells.
I feel like something like this could get people trying out and keep playing games up here. Just my $0.02.