Favorite achievements?

What are some of your favorite achievements?  
 
I would have to go with Two Cups One Girl and Chicks N' Booze N' Stuff.

I like Press START to Play.

I like this one Better than developers.
 
Mostly because of the name, But the challenge was also good.

The Avatar achievements. I mean, come on!

the one where you pop a mouth guard 3 meters in ufc, something like that, its pretty good

ORLY? from Blitz the League. I think you have lose big or something for that achievement. Its worth 0G