Well, that is a question a wife and a couple of former girlfriends have asked me, but never a bloke. I would like to say it is because such attractive young ladies as pictured above are thrilled to play such games themselves but, more importantly, they also like to hang around aging, slightly pudgy, graying, gentlemen, but I can't. Instead, read below for the more mundane answer the question
The answer is both simple and complex. Simple, in that I enjoy the collecting miniature "armies", I love the history (even science fiction and fantasy wargaming have some sort of history as fluff), the banter between players is amusing, and it brings together folks who might otherwise pass by each other on the street without so much as a "good day."
Games which inspire the imagination really get to me. So much so that I have small notebooks, loose papers, and binders full of game ideas and designs from nearly thirty years ago to the present. In fact, I am currently in the process of developing rules for a miniature game, a boardgame, a card game, and an online miniature wargame campaign. Aside from the latter, I may not actually publish these embryonic designs, but it is the process of design, the critical thinking evolving into a logical play experience, which provides further fuel for my passion of gaming.
Like many of my generation, the original Dungeons & Dragons certainly filled the niche of which I am apart. Not the same niche as that of this group of freaks below (admittedly, the elfin chick in the back row, second from left, would not be kicked out of my bed for eating crackers, but her friends need to be institutionalized).
Such games as Warhammer Quest, Battletech, GURPS, Traveller, and Twilight 2000 saw me playing as a bold adventurer, either deep within the lairs of sinister necromancers, as a pilot of a 20 meter tall warmachine, or even as a post-apocalyptic survivor trying to find enough food to last me the winter while evading the encroaching communist soldiers.
Were time not a valuable and perishable commodity, I would continue to write on, but alas, I must needs get back to work. Pray tell, why do YOU play wargames?