Patreon rewards? (Patreon)

So following my theme of being curious about your opinions, after the what would you add post, I decided I'd make one about Patreons rewards. I'm always wanting to say thank you more for the support you guys give me, so I was wondering what ideas you'd like as rewards.

Now this isn't to say I'll add any new rewards, as most I can think of would take more time away from development of the game, which I don't think anyone wants, but if anyone has any good suggestions, things you might have seen elsewhere that could work here, I'd be interested in knowing!

So anything you'd like to see added to the tiers rewards?