[Rune Son of Bjarne]

Actually you are not the only one who have spottet this resamblance between Odin and Sauron, David Day has writen about it in "Tolkien's Ring" a book I found highly facinating and was what made me like LotR for other things than just being a good story.

I for some reason also gets to think of Odin when Sauron and Finrod has their battle of verse. . .I suppose it is because Odin is the god of poetry (so is his son Brage). And indeed there was magic conected to poetry in the norse mythology, runes them self was magical.

Also the fact that he could change apearantses and even though old he was fair, but gruesome much like Sauron of the second age.