I'd been playing Roguelike games almost since their inception and had picked up a new variant of Moria that had colour! (most of us poo poo'd the idea as it felt all too graphicky, but we played it anyway because it actually did have better gameplay).
I'm down at ~level 20, when I turn the corner to see an out-of-depth 'D' only a couple of paces away. OMG. 'D's are ancient dragons, one of the more tougher critters in the game and usually down near the level 50 mark.
I turned to Andrew playing next to me and we both freak out a little before looking at all the options and strategizing how to run away without getting eaten or dare we attack?
After 15 minutes we've come up with a semi-decent strategy to take him on (there's no going back) so we take another step and the 'D' changes to red.
"O.M.G"!
Ancient multi-hued dragon! Biggest, baddest dragon around and NO chance of escaping now. We're both screaming at the screen and then, catching ourselves, laughing at each other getting so worked up about one little ASCII character ...
Imagination, the best graphics card bar none.