Laura of GAMElitist.com - "We all love a decent boss battle. It saddens me that recent titles seem to be lacking in such epic conclusions, with the notion of uber-baddies at the end of each chapter dwindling in favour of disappointing and lazily designed finales to an excellent game. I absolutely hate that."
my adds: Bayonetta's most of the boss battles, then God Hand's most of the boss battles, Viewtiful Joe, Conker's most of boss battles, madworld and No more heroes had lots of great boss battles....
The Boss and The End should be there too (I know, huge MGS fan).
Also I think the Demon Wall from FF4 should have been on there. That was probably one of the most epic things ever.