In my experience, when a guy posts such a question here, he really does want to shave his head. So I suggest you go for it. It is only hair, and if you really do not like it shaved, it will grow back. Though I do suggest you keep it shaved for 30 days. We find that the initial shock sometimes (most times) will make a guy not like it at first, but that shock will wane in a few weeks and then a guy can look at his reflection in a mirror and develop a more objective opinion.
Expect family and friends to be shocked as well, and you may (will) get some ribbing. That is an initial shock reaction as well.