I grew up in a post-Communist country, with family that'd all been negatively affected by the regime. My grandmother's family (2 adults and 4 kids) were kicked out of their home and had to live in a barn for a while, my great-granddad was hung from a tree and beaten until he passed out because he dared speak out against the state, and my great-uncle was in a labour camp for 4 years in Russia. Hell, my parents were in the revolution to overthrow the government, although it was more of an idealistic move than based on any real strong belief.
Regardless, I grew up with strong feelings against Communism (although I did go through a phase where I was fascinated by it, mainly because Romania got even worse post-Communism) and a strong centralized government.
Because I've always studied economic theory, I think it was only a natural progression for me to become quite interested in libertarianism. I'm now a business owner in a country that's progressively more leftie by the year, work in a highly regulated industry (that's being crippled by government intervention) so of course I've gravitated towards the whole less government, more capitalism thing. I'm also a pretty independent person overall and hate being told what to do so the idea of being babied by an (incredibly incompetent) government (full of idiots who can barely do their job, and the only reason they're employed in the public sector is because they couldn't make it in the private) drives me crazy.