Over protective, very aggressive towards new people

Question
I am lost as what to do with my 9month old male min pin. He is absolutely cuddly, happy, loving when it is just me and my boyfriend. He is great with my parents and their two dogs and few of our close friends who are around a fair bit. BUT...he is not kind to new people or people we meet while we are on walks. I am afraid that he is going to hurt someone one of these days. Not only does he growl and bark at them, but if they try to reach out for him to smell there hand..he attempts to nip at them. I try to control him, but it is impossible! I know his breed tend to be a little leary towards new comers, but this is beyind that. It is to the point that I can only walk him late at night or else his hair is straight up on his back and he is barking at everything. Any ideas how to help him and break him of this bad habit??

Answer
It sounds like you didn't do much research before getting this breed.  "A little leery" doesn't do this breed justice - Min Pins are notorious for being extremely suspicious of strangers, and aggressive to other animals.  Plus, they are also known for their excessive barking:-((  
So, IMO, you have your hands full.  Unfortunately, the solution, at least for now, is that you should not allow anyone to stick their hand out for him to sniff.  Every time you do, and he reacts in a negative way, he is being taught that it's ok to do so. Then, the behavior is being reinforced, and can actually escalate. Don't risk having him bite someone.
One thing you can try is to take him to a positive training class (never use force or physical punishment on a frightened or an aggressive dog) so that you can be more in control of him - in other words, so that you will be able to cue him to look at you instead of at strangers, other dogs, etc.  You can start at home by doing the "Attention" exercise here: www.clickerlessons.com.  There's a great book called "Click to Calm" that might help you, too.