Well, same kinds of questions as we asked you of airlines: What do you want most out of a hotel program, are you on your own budget or is it expense accounted, etc?

If it's fast earning at low cost of oodles of points that you can redeem at good value, then nothing beats Choice and Priority Club, especially if you're paying for the hotels on your own dime (well, at least where I often stay in Orange County CA, Priority Club has many hotels well under $100 many nights on nights when Hilton has maybe at most one, Marriott has none, and Hyatt often has none less than $150++). You also need to be able to book online (thus not through a company travel agent!) to get some of the best repeatable promos. And it helps a ton if you can "hotel hop" (change hotels nightly).

But if it's upgrades, then the answer is opposite. Upgrades are extremely rare at Best Western and Choice, and hit or miss at many Priority Club proerties. But of course, even with the families that are good for upgrades, it depends on the specific brand: For example, HHonors may decent about upgrades, but if you typically stay at HGIs or non-Suite Hamptons, there's nothing much to be upgraded to (all the rooms are so similar).

Btw, no one has any idea of what BW's business hotels are like. BW's motto is that every hotel is "independently owned and operated", which means on the one hand they're not as cookie cutter as other chains, but on the other hand means there's less consistency than at other chains. So you can't learn much about BW business hotels as a category, you have to evaluate each one (for which there's www.tripadvisor.com).