I just thought of something else...
I didn't really know about the differences in appearance when the movies came out as I read FotR and TTT after seeing the movies, and already had the movie characters in my head while voraciously reading RotK the summer before the movie. But now I'm rather conflicted, for example: Boromir and Faramir were stated to have dark hair, and Legolas' hair color is debated. My head almost explodes sometimes because I picture the lovely Boromir and Faramir as they appear in the movies, and then have to check myself and think "NO! DARK! THEY HAD *DARK* HAIR!" I have already decided that Legolas had dark hair, and this is fine with me because it will upset the hardcore Orlando Bloom fangirls ^^ ... plus blond Leggy is a bit pansy-ish and I find the thought of a raven-haired Elven archer far more appealing than Orlando in a wig.
But anyhow, these are the main debates that go on in my head. Maybe I'll make my own hybrid versions of Boromir and Faramir that will finally leave me in peace