Just had a closer look at the list, here are my more-considered thoughts (and keen to hear your own ones):
For starters, which people do you think shouldn't be on the list? For me, there should be no rappers. To be a song, lyrics have to be sung as a melody - not spoken. Therefore Kanye, Timbaland, Eminem, Biggie, Jay Z etc should not be on there. And the ABBA peeps are at #100 - therefore all those rappers and Taylor Swift have all written better songs! This is crazy! Also, there's been debate about all the songwriting teams yet Lennon and McCartney are listed separately - I think this is fair enough - most people that know the Beatles' music know that they generally wrote separately and that the 'Lennon/McCartney' partnership was in name only. Plus of course, both these guys also had massive solo careers in their own right.
A few placings I thought were a bit strange - Elton John at 48 for example shows the Americentric partiality in the list - well below the likes of Robbie Robertson, Jacskon Browne and Jerry Bloody Garcia for goodness' sake! What the hell are any of them doing there?! Probably the strangest placing of all, was the inclusion of Chuck Berry at #4. I recently got a box set of everything he ever recorded - 16 discs, year-by-year, all remastered including live stuff. I was hoping to uncover some 'lost gems' but it dawned on me that every other song on all his albums was a rewrite of his hit song riffs - over and over. People accused The Beach Boys and other groups of pinching his hooks - well he was the king of recycling the same old song over and over. Granted, his greatest tunes were rock and roll landmarks - but the 4th-greatest songwriter of all-time?
I'd be interested in who you think should be your personal #1. Mine of course would be Paul McCartney (no big shock there, lol). Who would you have on the list that isn't there? I would have Elliott Smith, Jeff Lynne, and Patti Rothberg. It sure would be fun to construct one's own 'Top 100' list!