Something I would have to say on the issue is that I was generally like him and I still am on the topic of enjoying more to speaking to adults more than teens. One such reason is that I myself have a thirst for knowledge. Teenagers, more obvious than not, are fairly unintelligent in many aspects of the common world. I'm this same way as your son and I just simply enjoy talking to adults, aquiring information, and just learning in general. Sure I have friends that I hang out with quite a bit, but they are generally not the type to strike up long, serious, and inquisitive conversations with.
As for sports I can't say I'm the same way, because I love to get out on a soccer feel and have some fun. My roommate however, has never played a sport in his life, and is otherwise generally uninterested in even watching or hearing of sports. He also enjoys music very much and talks about it quite often. I don't want to jump to any conclusion, but just make a point as well- you and you're husband can't choose what you're son will like or dislike and I'm sure you certainly know this. If you're son likes music, so what? It's definitely not irregular. Sports aren't for everyone and perhaps your son is one of those people.
As far as girlfriends go, not everyone is looking for a girlfriend at that age. I did and found one for a while. It was generally uninteresting at the time, and that could be the case for him as well. He could just find the whole concept of a relationship particularly boring at this point in time or perhaps he doesn't want to focus the time into one person. You said he is quite a bright young boy and for that maybe he realizes/thinks that he won't benefit much from a relationship at a young age.
Authority figures never really caught my attention too much either. I typically ignored/disrespected them because I felt they had no purpose in my life and I didn't want to be told what to do or how to do it. I just wanted to make my own decisions and learn from those experiences, which could be the same way your son is feeling/thinking.
I don't know what type of experience he had with the driving, but I'm pretty sure its not uncommon to fear something that has happened in your past. I would suggest talking to him about it and if he does not listen give him more time to get over it, he'll come out of his shell when he's ready and you can't or don't really want to rush him.
I don't exactly know what you mean by he doesn't care about honor, I thought you left that a little vague, but if you explained it to me a little more I'm sure I could give you a few ideas. But as the last poster said, you can't really push your son into your ideal views or anything, you have to let him chose his own path. The more you try to, the more he will resist, and that could cause more problems. Hope this was a help, he seems pretty normal and pretty hand in hand with how I was at his age. Though I'm not much older and 18, I figured I could relay to you some insight as to how us teenagers sometimes think.