Honestly, there isn't one specific event that inspired me. I've been playing games since I was very little (late SNES-early N64 days), and it's hard to overstate what an influence they had on me growing up. I would say the games that had the single greatest impact on me as a developer were the original Baldur's Gate series on the computer. I got the first game in late 2002 for Christmas without its expansion, and the others came shortly after. The amount of hours I spent getting lost in the wilderness, rolling and rerolling characters, and trying to discover all of the game's secrets shaped me into the kind of developer I am today.
My first taste of actually making something of my own was building my own server in Neverwinter Nights. This would have been about 2006-2008, and it was there I also learned the basics of how to write code. Getting a taste of making my own world and server made me want more, and from there it eventually led to making my own games with my own rules and assets. I only wish I had started sooner!