Befitting to the game that basically destroyed my social life for the past two months (and reviewed recently), I've put together a short list of ways that you can tell you're just a little too addicted to Fallout 3.
Remember, the first step to recovery is admitting you have a problem.
So, here goes:
#10. You feel a sudden urge to buy swing and ragtime CD's
#9. When you squashed that bug on your wall yesterday, you actually muttered "d@mn radroach" under your breath
#8. You taught yourself Morse Code to find out what those towers were broadcasting, only to be disappointed it wasn't anything cool or secret
#7. You press the V.A.T.S. button in other FPS's by force of habit, only to get fragged when you realize it isn't there
#6. Your girlfriend hates the game because she knows every time you turn it on you won't hear anything she says to you
#5. You've woken up aforementioned girlfriend at 2:30AM on a weekday with the blaring sounds of emptying your Chinese Assult Rifle into a Super Mutant
#4. You hum "I Don't Want to Start the World On Fire" on a regular basis and don't even realize it
#3. There's a staggering sense of emptiness there now that you've beaten the game
#2. You plan on filling that empty space by playing through the whole game again, this time by being "good" rather than blowing the heads off of random townspeople