for FPS games, my keyboard layout is an odd one. All the movement keys are on the left-side home row, and everything else is nearby. In fact, my computer has gone completely untouched during LAN parties just because my controls are weird, and I absolutely HATE it when people fiddle with my settings.... Not that I've hosted a LAN party any time in the last few years... Anyway, here's the weirdness:
F - Forward D - Backward S - Strafe Right A - Strafe Left E - Activate (pressing buttons and the like...) R - Reload G - In HL2, and other games that include one, it's the flashlight/night-vision. In other games, it might be a melee attack or something else useful. C - Crouch
Space - Jump T - opens a chat window, or somesuch... Q/W - Scrolls through the inventory, for games that have one. TAB - Opens map, mission objectives, or anything else useful that appears in a different window.