I don't know what it is about demos- some of them are just packed with shiny goodness that attracts me more than even the full game.
I'm curious specifically what demos have had this effect on you guys.
For myself:
Tribes: Vengeance MP Demo
UT 2004 MP Demo
Savage: The Battle for Newerth Demo
And, foremost, Might and Magic: Dark Messiah SP demo. Tonight I got back on it, briefly, and did the second level with alternating hands tied behind my back, and then with feet.
I beat the fucking level with my feet.
Anyhow, what about y'all?