Boromir and his relationship with the Fellowship

Having read the books countless times in my many seasons on this planet there is something that has always struck me as odd and that is Boromir's situation.

Upon reading through Fellowship again recently it always amazes me that his general attitude is not noticed or questioned by the others apart from Frodo. While he is obviousley noble and strong his personality seems to be one of self indulgence and a lack of faith in others abilities. He also coveted the Ring from his first appearance although this is well disguised by Tolkien generally.

Upon his death he is greatly mourned and given an amazing send off by the Aragorn, Gimli and Legolas but this does not fit in with his attitude in the group although I have no doubt he was a great man in certain respects.

Anyone else know if the companies relationships are mentioned in any of the other books, particularly from Boromir's perspective? Anyone have any views?