May you not go to Valhalla for that, Avon !
All day brawling and all night getting pissed up, don't you like the idea?
A striking feature of Norse mythology was that it was the newest (i.e. most recent) religion in Europe, but had some very ancient roots. It also has parallels with Christianity, classical religions, and even Hindu beliefs.
A very important feature is that it is the only major religion that is well documented that does not promise an eternal afterlife, or, for most folk, an afterlife at all.
The character Odin (Anglo-Saxon: Woden, Germanic: Wotan) shares characteristics with several classical and Christian figures, and, indeed, several latter day Roman cults do this, too. The Roman cult of Mithras, for example, has Mithras born in a cave in midwinter, and who finally dies nailed to a tree. His name refers to "the light". Odin was also nailed to a tree, the Ydgrasil or World Tree, in order to gain knowledge which he passed on to man. The Norse poem, "the speech of the high one" has the line:
I know I hung on that windswept tree
for nine days
Myself a sacrifice to myself.
Significant are the two "myselves". This is akin to far eastern philosophies/ religions in that the physical self (Odin's body and right eye) are sacrificed for the sake of the "higher", spiritual self.
Plainly, the nailing to a tree echoes Christ's death, but it doesn't end there, because Odin also had a son called Baldur (sometime, Balder) who was good and kind but who was murdered in his youth by the Norse equivalent of Satan the trickster, Loki. Norse mythology has it that when the world is renewed, Baldur will live again. This little story is where we get our habit of kissing underneath mistletoe from, too.
There are many, many parallels between most common religions, and it is very likely that they are merely tweaked for local consumption versions of other, previous religions. Even according to Norse mythology, Odin was never a man, always a God and hence lived in Asgard, only venturing down to earth when it suited him, or he wanted to cause trouble. (Norsemen were not very reverential about their Gods, and saw most of them as trouble, or, at least, a blessing in disguise, rather like Homer stated that the Gods play games with men's lives and are ultimately indifferent).
Most Wessex kings claimed descent from Odin, but it is the nature of kings to claim divine rights or ancestry. As such, it's very doubtful that Odin ever existed.