Easter eggs: love 'em or just meh? Halo:Reach warthog race

There's a little known (for now anyway) Easter egg in Halo:Reach that enables you to have a warthog race. (If you want to know how, click here). Which brings up the question, what do you think of Easter eggs?

Games are full of them. You can get Master Chief armor and a plasma sword in Fable 2, teddy bears in Modern Warfare 2, Yoshi's cameo at the end of Super Mario 64, and of course you can chase all over Grand Theft Auto games to find actual eggs. So that brings up the question, do you like eegs?

I think a good little in joke occasionally is ok, one of the fun little things about gaming that makes it possible, in  a good game, to have more depth than you can get in say a movie. Anything more than that, to me, just runs the risk of taking me out of the game experience. I've worked hard emotionally to get involved in most of the games I play, and I want to be as immersed in that world as possible. So exploring a cave in Morrowind and running across the corpse of a character named Peke Utchoo (it's there) doesn't add to the game for me. 

But I might be the exception. What do you think about Easter eggs, good or bad? And what are your favorites?