"Ship Of Fools". His words, voice, and the music are hauntingly sexy. But tomorrow I'm sure I'll have another song of his to compare it too.
But I would have to say his smile, his hair, and his sense of humour. He is BEYOND cute and sexy in the Earls Court shows from 1975 on the Led Zep DVD.
I think a 2008 Robert Plant roadtrip is in order! lol