Custom built PC with some sort of Lenovo case, graphics processing power from here to the moon, only two gigs of ram, everything else is moderate to above average hardware-wise.
Running XP SP3 with dual monitors, and since I like to play in a window so I can tab out faster to Google things/Skype I have the taskbar on my secondary smaller monitor to my left.
My mouse is a wireless Logitech M310 and my keyboard is Microsoft media something-or-other. Primary and secondary monitors are, respectively, an Acer 1366x768 and a Dell 1024x768 (Glad they both have the same height). My mic is a GE thing on a stand... Yeah.
And I like to use shift to sprint and ctrl to crouch, r to reload, e to use, f for flashlight, q for previous weapon or holster weapon, and space for jump. M1 for primary action with held item, m2 for scope or secondary if said item does not have a scope, and if it has a scope and a secondary then I use mmb for secondary. I prefer number keys above the letters to be used for misc. or off-hand items if my weapon roster is small, but I do use them for weapon switch when it's large (e.g. Half-Life, Red Faction, etc.). Scroll wheel is always for weapon switch, tab for scores, I ALWAYS use fast-switch, and I NEVER bind use caps lock. I sometimes use alt for tertiary actions, such as movement modifiers when sniping (ALL GAMES WITH SNIPER COMBAT NEED THIS FUNCTION).
Soooo... That's pretty much it. Thanks for the time sink, thread!