What would you be glad to see as a reward in a secret place?

[Timoteeei]

I'm just curious: what players expect to find while searching for a secret places? What are so exclusive rewards could force players to start searching around? What would you be glad to see as a reward for your hard searching to not to be disappointed?

Please leave your comment here, the answers will be used for my inspiration. I like secrets/easter eggs so i want (and i do) secrets in my maps.

P.S. You like "Minecraft" and "Portal 2" but you still have not played my maps? Let's go, check out my workshop ;)

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rooms with screens of fake half life 3 and portal 3 trailers like in this fake video:
http://www.youtube.com/watch?v=q7EUmizPr4Y

[ella]

A hidden companion cube, or something having to do with companion cubes, like a heart on a wall.

[chloe]

Hey! this video came out on my birthday! But as a secret, I would probably want to see cave johnson's coffin, OR if he DID get put into a computer, but it was a failed experiment, and he got put aside. He would have some really funny lines, and if you picked him up and brought him back into the test chamber, he recgonises GLaDOS as caroline, and has a conversation with her (I know GLaDOS deleted caroline, so maybe that could influence some lines) AND maybe some secrets could be revealed (AKA who chell's parents are). IT WOULD BE AWESOME!

[Timoteeei]

How about a link to a hidden youtube video? I mean that you have to type founded link in a internet browser to take a look for a video, not watch directly in-game