Thanks for the additional replies everyone.
After doing some further checking, Marriott and Hilton certainly are available in the locations I’d frequent for work travel within North America. Hyatt not so much so I can rule them out which is a shame because I loved my stays at the Hyatt Regency and Grand Hyatt at DFW.
For personal travel, just the traditional touristy spots like London, Paris and Rome. In Asia, Tokyo, Singapore, Shanghai. Dubai in the Middle East. In North America, virtually any city big and small is on the possibilities list.
I am leaning towards Marriott but will also look at Hilton. I also may just stick with what I’m familiar with in IHG. I really have no complaints with IHG (well, I could use PB back even at 15k). Just want to see what’s on the other side. Thanks everyone.