Make sure the immersion remains part of the challenge!
That's a broad statement. Encompasses character names, NPC names, lore, element of surprise, learning of skills and the importance they hold, close-knit community...all sorts of things. But still, this has been the cry in the sky since UO and EQ presented puzzles and challanges that kept people working on things and not being able to rush to the top in a week!
just one?????
