I did a top 21 CD once, but excluded any Morrissey songs as they'd be redundant to a fellow fan.
Too many very new bands with multiple high entries. Really undermines the 'of all time' bit IMO.
Can't believe all the Florence & The Machine singles are on there. Would've been nice to see the album tracks that a old mate of mine wrote for her.
Last observation, as I could pick holes in the list all night; Walcott is clearly the best Vampire Weekend tune by miles. Which featured in my top 21.