If promotions are your prime motivator for selecting properties
You might note the following:
some of my favorite Starwood properties in LA
And, in fact, I have given Starwood business in 2011 (that wasn't really decided on the basis of promos, though the Q1 promos were nice, but on being SPG Gold+good hotel for needs+good rate), and do plan on giving Starwood more business in 2011 (because those hotels meet my needs, plus I want to keep Gold). It's just a poorly timed gap. Had there been no gap, I would have likely decided differently.
That being said, Hilton has promos going that will make it worth my while to consider them for business in 2011, too, beyond what they offer in kickbacks to me. Isn't that the point of promotions- to encourage customers to steer business their way?