Which rules-light RPG system would you recommend?

[Infernal Teddy]

I'm looking for something to use as an intro to RPGs for people who haven't played before, so my chief criteria are genre versatility and easy learning. I've looked at some samples for True20 and West End Games' D6 Fantasy - both of which I like - but I'm not very informed on what's out there.

What's your favourite rules-light system?

Engel. Because the Arcana system in the original was almost rules FREE.