Not all CY that I have been to have suites, and some only have one or two, so I have certainly not had suites at all that I have been to in the last few years. I mentioned the CY suite upgrades that I received because I thought they were noteworthy, and actually, now that I think of it, I just remembered another one, which was particularly nice, and quite useful for business purposes:
Courtyard San Francisco Airport/Oyster Point Waterfront (5 stays, 4 upgrades to Oversized 2 Room King Suite, which twice came in handy for business meetingss, this was a very nice Courtyard at the time that I was last there in October 2005, but according to marriott.com there was just a $3M renovation)