I agree with those who mentioned that you should get preferential treatment if you stay at one CY property on a consistent basis. While CYs do not have as much to offer in the way of upgrades, you could ask them to comp you to breakfast and give you more leeway regarding room changes and potential upgrades.

Frequent guests to a particular property represent good business for a hotel. You should not be afraid to point that out to the GM of the CY.