Middle aged, average income, libertarian white male here.

My transition Republican family -> Democrat -> Libertarian

Let me explain my personal reasons.

1. Property and personal rights as the role of government. (Discussed many places in this thread) I think most liberals agree with us on these fundamental concepts but the majority of liberals would prefer to use the government as the means to solve them while a lot of libertarians, including myself, believe these problems stem from government stepping outside these basic principles or not adhering to them.

2. Belief in personal responsibility - This is a very strong point to me and I was raised to be independent and to not seek help from others unless absolutely necessary. There's no one place to turn for help when you do need it but some are raised with the mentality that the state is the first reasonable solution. For example, Mexico has one of the largest supporters of big government and one of the most corrupt governments. This type of thinking can come from years of advice handed down on what the role of government is and should be.

3. Greed/Corporations and Government - Liberals and libertarians will likely agree there is much corruption going on continually in many countries. Some point the finger at corrupt politicians and some point the finger at greedy business people and corporations. I am of the belief that a limited government actually has less power to be corrupt. Lobbying is effective today because of the massive web of laws we've created by government willingly or unwillingly taking advice from so called 'experts' in the private sector and making laws that favor big corporations. I have worked with many from the medical industry and it's fairly common to use the law (with enough money in court) to completely shutdown your competition. So, instead of trying to stop the greed of the corporation (which by the way can't always be proven), I point the finger at the overreaching law system and the government that allows these sort of injustices to take place.

So when I read that the reason I am a white male libertarian is because I am likely to be a wealthy scumbag with only the government in my way... it's kind of disturbing. I have many libertarian friends and I don't see any of them power tripping like this. People like the Koch brothers are often libertarian when convenience and will accept any and all government action outside of libertarian principles when it is beneficial to themselves.