How Do You Choose A Favourite Song?

How do you choose a favourite song?

Do you choose it by the background?
Or the lyrics or the voice?
Do you choose it by how good it sounds?
Or how much it annoys?

My attempt at a little rhyme, to introduce my post- hope it wasn't too harmful;)

So, as I was listening to music(btw, my favourite song, Santa Monica by Theory of a Deadman) and going to get cookies, I thought about how I had chosen my favourite song, -which was very hard to do, because I like so many, of so many different types and liking such a wide variety of music, makes it extra hard to choose a favourite-which I had chosen, because it is the one song I never get tired of. No matter how much I listen to it, I'd never get bored or tired of it. But does this mean it's my favourite? One would think that if one enjoyed a song so much they would love to listen to it non-stop, it would their favourite, would it not? Maybe, but there are other songs I enjoy just as much if not more, but I do tire of them... I started to wonder if I had chosen it the right way, and indeed, do have more than one favourite song. Have you had or are having a similiar experience or thoughts?

I do have another favourite, which I classify as my favourite " happy song", which is Kryptonite by Three Doors Down, I think. This, I do get tired of, if I listen to it too often, but I think it is an awesome song, for the background music, instruments, voice lyrics and everything- including how good it makes me feel, and how easy it is to dance to!

So how do you choose your favourite song? Can you narrow it down to just one? Why do you use this way to choose a favourite? And lastly, what is/are your favourite song(s)?