I agree with you Randy, in that YMMV isn't fitting, idiosyncrasies aside, and your proposal of YRMV is much better. Personally, I hate using it at all because I feel like it's become almost like a politically-correct-better-cover-my-butt-because-I-shared-an-opinion-thats-possibly-different-than-someone-elses kinda thing and I absolutely refuse to play that game in life or anywhere else. I think one can easily share an opinion and present it as obviously an opinion without having to use silly acronyms to qualify it as such. Many have become gunshy and start throwing it into practically every post and I think that's ridiculous. We should be able to have polite discourse and debate here without the quasi-PC junk.
But, YMMV
You mean PCBCMBBISAOTPDTSE.