I usually don't go for the whole "I don't understand what others see in x song..." thing ...
BUT
I don't understand what other see in Song For Someone. I don't think there's anything interesting about it. People mention the vocal performance, but I don't hear anything special there, either.
I know I'll go back to it again and give it umpteen more listens, and it will either grow on me or it won't, but it is one of those rare songs where I am baffled by people professing love for it.
Also, the chorus keeps getting stuck in my head, which is not helping me like it.