I'm stuck with MR because
1. my favorite property is a MR property
2. the FI's continually give me low cost options that I don't get elsewhere
3. they are everywhere
on that note; I do spread the wealth as the moment i hit 75 nights I'm done
SPG gets its 25 stays
Hyatt gets its 25 stays
Radisson gets its 25 nights
even Hilton gets a few select nights on occasion