Favourite Beatles song?

What is you absolute favourite Beatles song? If you could choose only one. And why? I know it is a hard question!

For me it is Something. The build-up through the whole song. First almost only bass and drums, with some easy guitar. Then you get the organ, plus strings. The bass intensifies, and the strings too, more and more movement! And then in the bridge, pizzicato strings together with intensified light chords and really cool harmonization through the whole piece. And after all of this, Georges best guitar solo in my opinion! And that bass part! Wjo other than Paul would come up with such a melodic bass part? It is for me the perfect song.

I also really love how Ringo's playing developes through the whole song. Before that really cool drumpart in the Bridge!