To give my semi-standard LOTRLotR apocrypha answer, if you want a WAYway different angle on Arwen and Aragorn, read "The Last Ring-bearer" by Yeskov.
I think you will like it a lot better than the Professor's angle.
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As far as the Professor, you gotta remember that he based his work heavily on Northern sagas, and general medieval tradition. Arwen and Aragorn's relationship is a cross between a full-on dictionary definition of a Courtly LoveCourtly Love, married to a Romantic story of an immortal sacrificing immortality for the sake of love.
Who needs character when you are the embodiment of TWO archetypes at once?