In my interpretation of the reading, there seems to be a middle aged man going through a mid-life crisis; maybe a middle aged man who is crossing over into being considered "old". His consciousness of how everyone else is recognizing his flaws, especially his balding head, is what makes me come to this assumption. He refers to his balding head more than once. On line 41 it states "They will say, 'How his hair is growing thin!'" Also on lines 82-83 he states, "Though I have seen my head (grown slightly bald) brought in upon a platter." This line makes it seem like he thinks his head is some type of display for people. I was also presume that he is middle classed or maybe a little more than middle classed because of his attire described in lines 42-43 "My morning coat, my collar mounting firmly to the chin, My necktie rich and modest, but asserted by a simple pin" His attire would suggest that he probably has a decent job based on his attire that he describes.
I would also assume that he is not comfortable around women by his statement "women come and go, Talking of Michelangelo". He sees these women and they catch his attention but he definitely doesn't catch theirs. I would also link this to the assumption that this is a very awkward looking person, maybe a little nerdy. The reason I believe this is because he is obviously not confident in whatever he does displayed in line 45-46 when he questions himself "Do I dare/Disturb the universe". Here we see that he sees himself as an interruption obviously which is not a confident person.