You asked for
* 10 PTO days: worth about $5,000
* Bonus for CY2010: you really do not earn it, and you'll have the stock option anyway
* Possible payback of GC fee $12,000: The sign on bonus $15,000 can cover about $10,000 of it
So over all, you should be happy that you had a good strategy negotiating the offer, and they sincerely addressed your requests. Time to be happy, be thankful and develop a good relationship with your employer!