In Daniel 10:11, 19 Daniel is referred to as a beloved man. Commentators explain this term to mean pure, or that his actions were beloved. Midrashim explain this more generally that the righteous are beloved to God, angels and man.
Daniel certainly exhibited many righteous traits, but so did many other people. Furthermore the title beloved man seems to be unique. Why is this term used specifically and why is it applied to Daniel exclusively?