I love watching the players get the wide-eyed look. It's the wide-eyed look that shows that they've just uncovered some big secret, and the combination of elation, pride, dawning terror at the realization of what they're facing, and then delight at the story I've created... that's what it's all about for me. That moment right there.
All that other stuff, they're onto now. I mean, heck, they've got macros of my sayings on our chatboards. Tafal is our automated assistant. For example:
Player: Tafal, what time is it?
Tafal: It's 8:02.68, Player.
Player: Tafal, be Player2.
Tafal: I become invisible, levitate 20 feet up, and then fireball everything with my haste action.
Player: Tafal, be Player3.
Tafal: Okay, I'm AC37.
Now, when it comes to me:
Player: Tafal, be DMP
Tafal: Half-dragon fiendish were-beholders!
Player: Tafal, be DMP
Tafal: It's not important. Don't worry about it. Probably nothing.
Player: Tafal, be DMP
Tafal: Does a 57 hit? Okay, how many hit points did you have? Okay, what's your Con? Okay, why don't you go check your e-mail?
And so on. That stuff is all good for fun and games, but the look... that's what makes it all worth it.