For me, it always comes down to Marriott vs. Hyatt (I don't stay at Hilton for several reasons - the largest is their lack of a set late check-out benefit Hilton as a full-serve option is usually down my list for several reasons, although as a 2.5 star over-the-road option it can be quite competitive), and then, it really comes down to which chain has the property that looks the most interesting to me.
Well summarized, but further modified to reflect my priorities.
Similar historic view of Hyatt and Marriott, but Hyatt isn't knocking it out of the park right now either.
In a stay of any duration, I value a hot breakfast and some form of evening service and it motivates the hotel to be booked. I'll be impressed if Marriott really does slap the North American hotels back into line. Hyatt isn't talking about it yet. In both cases I'll believe it when I see it.