With those data points, here are a couple more factors in favor of Marriott:

- They are everywhere and have a consistently nice product for the business customers. Urban Marriotts are, for the most part, very nice. They have fewer oddball bad properties than Sheraton and Hilton, IMHO. (I don't have enough Hyatt experience to comment on them.)

- You are doing enough volume to earn some of the best ongoing rewards out there, IMHO: the Marriott travel packages with 120,000 FF miles plus 7 nights' stay.

One possible issue: your Marriott choices on Maui are going to be limited very soon. The Kaanapali location is going all-timeshare and the smaller, romantic Renaissance Wailea is converting to Starwood (a 'W' hotel). That leaves an Outrigger that has recently converted to Marriott (I sense you want something more luxurious than this) or the Ritz Kapalua (fabulous golf destination, but very expensive in terms of MR points required).