What kind of rewards would you like to see? (Patreon)

Both to draw in more people and to give my current supporters more goodies, I've been wondering what else I can add to my pledge rewards. 

Two ideas I had:

-WIP posts: I'll upload random posts each week showing what I'm working on and how each picture is coming along. These wouldn't be tutorials or anything, just updates on what I'm doing. I'd probably upload some of these to Deviantart and Tumblr from time-to-time, but Patrons would see more of them, more often.

-Access to a Patreon-only Discord server: Not entirely sure about this one mostly due to having to moderate people, but I could set it up if there's enough interest (probably text only, no voice). Patrons could just hop on whenever and talk to me or each other in a chat room.

So, do any of you have some reward ideas in mind? Maybe it's something that other Creators offer, maybe it's something you haven't seen anyone do, let me know!