Oh dear, I remember voting, but I don't remember who I voted for. I think it was a hard choice, and for the first time, I must say that I agree with Vir that I felt unable to vote. How am I supposed to know who readers misinterpret? How do I even know that my interpretation is the right one?
But I voted for Gollum, I think. This is beacuase I have about five or six friends who have all read the LOTR, and whenever we talk about Gollum, he is always a villain, a sort of force that acts to hinder the destruction of the Ring, and they rarely speak of him as a victim (which he is). Maybe they didn't read the book carefully enough, or maybe they simply didn't pay as much attention to a character that was neither cute nor handsome nor heroic (they know all the Aragorn and Arwen details well enough). I personally don't see why Gollum may be misunderstood, for anyone who has read the trilogy would feel at least a little dint of pity for him, or at least acknowledge his part in the destruction of the Ring, yet most of the readers who are not overly fanatic about LOTR seem to undervalue Gollum.
Just my real-life observations. The other characters are less misunderstood. I mean, everyone knows how complex Feanor is, and how blinded Boromir was by the Ring, and how Tom Bambadil is an enigma, and how Frodo suffered and eventually gave into the temptation of the Ring.
But yes, I voted for Gollum.