I think that because we are humans, we tend to humanize God and the things of God. By doing this, we end up lowering God to our standards and to our images. Instead of God being who He is (Almighty, Everlasting, all powerful, all knowing, ever present etc), God ends up being conformed to our thinking and ability to visualize Him. Perhaps this is why all the attempts to portray Jesus (black, white, big, slender, long hair, short hair etc) are dangerous and are borderline idolatry. I have known believers who have so many images of Jesus around, their home looks like a pagan temple.
There is no human being alive today that knows what Jesus looked like. Any attempt to come up with an image of Him is pure speculation that is usually motivated by movies and art. For this reason, we try to avoid any pictures or other forms of art that have some image of what the artist thinks Jesus looked like. This may seem like a trivial thing, but it is not. Idolatry is subtle and creeps in through man's desire to have an image to go with a name.
Many of you on this site are truly beloved to me. I consider you as friends. Yet, I have no idea what many of you look like, nor do I really care. I do not love and respect you because of what you look like but rather because of who you are, what you write and how you pray. Why are we, as humans, so hung up on appearance? Why does everything in life, or so it appears at time, revolve around being pretty, handsome, having beautiful hair, etc. A person's true worth is not found in their outward appearance but rather what is found in their heart.
I freely admit that I am not much to look at. The years of physical pain I have endured along with other factors prohibit me from adorning the cover of any magazine. For the most part I do not care what people think about me, for there is no way I can ever live up to their standards. I am who I am and I refuse to spend my life attempting to become something and someone I am not. People have to appreciate me for who I am and not because of the way I look.
When we think of Jesus, we must drive from our minds all the images we have been fed and allow Him to show us who He is. When I hear songs talking about how beautiful Jesus is, I wonder if they are referring to images or what Jesus has revealed to them individually. When I talk to and worship Jesus, I do not see a long haired man with a pretty face. I do not see anyone. I cherish the reality that when the trumpet sounds, THEN I will see Jesus face to face and see Him for who He is and not what I assumed He would look like.
What if Jesus is indeed a man of color with short hair? If so, many believers may end up wandering around heaven looking for a white man with long hair. This sounds crazy, but I hope it conveys my point that we need get rid of all the preconceived ideas we have of who and what Jesus looks like and concentrate on who and what He is to us in this life. We have an eternity to enjoy His presence and beauty. One more thought; just how beautiful was Jesus when He was hanging on the cross, mangled and not even looking like a man? Most turned their eyes away from Him due to his ugliness. I pray we never to that to Him or any of His people.