I only had experience with shotguns until the age of 20. After shooting handguns and rifles, I found that I enjoyed them. This, however, was not the main reason I started buying. My first gun was Springfield 1911 .45 acp. I bought this shortly before my 22nd birthday. The reason I bought this handgun was because of a college paper I wrote regarding gun control.
I wrote the paper for a poli sci class, around the time of the AWB renewal issue. I always had the mentality that people should be able to buy what they want with limited controls, as the bad guys will always get what is available anyway. Even with this attitude, I never gave much thought to actually owning a gun. I never felt like I needed it, always lived in a low crime area. After researching gun control, and reading John Lott's books, I realized exactly how close the 2nd was to being outlawed.
The idea of this happening scared me, as we are all aware of the consequences. Also I realized that I had spent my whole life dependent on other people for my security. I now own several firearms (including EBR's), carry concealed, and plan to purchase many more.