First time I'd heard of the original X-COM was on the Dwarf Fortress forums. It took GuavaMoment's excellent LP to get me to realize what the game actually was and after dedicating most of a summer to it I recall hungrily trolling the Internet for anything that even remotely resembled an updated version. A few competitors, several in-progress projects (OpenXCOM and Xenonauts included, I'd estimate circa 2010 or maybe 2011), but nothing close enough or free enough to satisfy.
The new XCOM I was vaguely aware of and finally broke down and pre-ordered once the demo came out; I went in knowing it was very much a modern take on the basic idea and wasn't disappointed by it, whatever shortcomings I did find. By the time my gaming cycle came back around to 'non-twitch single-player games', OpenXCOM was in a playable state, I messed around a lot with that, and then my friends started non-stop chatter about Enemy Within sometime in September. At that prompting I messed around with the Long War mod for XCOM2012, which was an interesting metamorphosis.
Aware Xenonauts was playable and that it seemed to be what I really wanted, I wound up going whole-hog and getting EW and Xenonauts on the same day, aware they'd scratch two different itches. So far I haven't had cause to regret the decision.
Long-winded personal X-COM history aside, I'm a twenty-something Texan college layabout and lifetime gamer, interested in both playing them and the craft that goes into creating them. I've always adored any game that allows for projecting personalities onto units to make my own personal little stories (cough-dwarf-fortress-cough), and that's almost as big a draw as the gameplay itself for me.