I know, I know, I'm going to sound really derivative here but
jings! I cannot stop myself from adding to this wonderful thread.
Gandalf:
Fordim Hedgethistle, because he is exceptionally wise, knows what he's doing, and is prone to mirth. Also strikes me as looking like Gandalf for some reason, complete with long grey hair.
Frodo:
Son of Numenor, because he seems serious, is very clever and very polite.
Samwise:
Saraphim, because she has great character, is very friendly and humble, and maybe a bit shy too.
Meriadoc:
davem, because he is exceptionally clever and brilliant (maybe I'm over-praising Merry here!) and also enjoys merriment.
Peregrin:
Diamond, because the humour and humble nature is just so.....
Tookish.
Aragorn:
The Barrow-wight, because he is wise and stern and merry (when necessary) and is leading the army of Barrowdowners.
Gimli:
The Saucepan Man, because he is loyal and jovial and probably loves beer.
Legolas:
rimbaud, because he is humourous and friendly and clever and serious all at the same time. And there's maybe a bit of that Peter Pan avatar in there as well!
Boromir:
Sharku, because of the responsibility, good character and hint of menace that surely lurks within.
I could go on and on and list every character from
The Lord of the Rings but I shall not do that until
Fordim gives the go ahead.