So what do I learn here about Jesus, the "Son of Man"? He sometimes did things that made people uncomfortable. I can picture Him as a boy or teenager inviting over a friend whom others saw as a loser. Some of the people He befriended were likely homeless. I can picture Him taking food to a person who was ill -- even someone with a contagious disease, whom others were afraid to approach. I can picture Him having deep conversations with hurting people, helping them find God's way through their pain. Some of these hurting people were surely outcasts; undoubtedly, some of them were female. In other words, Jesus broke social taboos. In order to be the person God describes in Isaiah 58, you have to go out on a limb. To do so you will inevitably break some social taboos, and people who break taboos are not often patted on the back by friends and family. Jesus was no exception to this -- I don't think "Man of sorrows, and acquainted with grief" is just a reference to the sorrows and grief He experienced on the cross. Jesus took personal risks to show God's love to forgotten people, and to do what the Father asked of Him even when it wasn't the comfortable or popular thing to do.
The exciting thing about discovering this "profile" of Jesus is that it's just the tip of the iceberg. What was the historical Jesus like? Go hunting in scripture. Every time God has told us what's expected of our own character, He's given us a portrait of His Son.