I've been a collector most of my life. When I was a child, I liked to collect rocks (I've no idea why). I later moved on to key chains, then baseball and comic cards. In middle school, I moved on to a wide variety of comic books. Later in high school I collected anything and everything that is Sublime.
Most of these have come and gone. One collection that has remained a constant, however, is video games. I've kept nearly all consoles and console games I've ever had, and moved on to a small arcade collection while in college. Arcade collecting is much more difficult due to the space they take up, but I manage :)