1. Don't ask for cash or an exit package imo. This isn't a mature, profitable company. It's a startup. You took a shot, you missed, and you're quitting. I think it's fair for there to just be a clean break there. Either that, or stick with the company and see it through.

2. Keeping the vested equity seems fair to me. The entire point of that vested equity is to represent the sweat you put into the business.

Agree, but asking for his personal investment contribution back is totally fair. Also, make sure you understand how future investment will affect your 10%. Don't want to be left in a Eduardo Saverin (Zuck) situation.