Can we get some hints for the 2015 secret hats?

Question

We're a week into Winter Bash 2015, and a lot of secret hats have been found. How do you get these secret hats for yourself? Well, figuring that out is half the fun! I mean, you could be boring and just cheat off other people's work, but nuts to that, I say. There's nothing worse than a cheaty cheating cheater.

If you want to Do it Yourself (see what I did there?) but just need a little help (or you tried to cheat but nobody else had figured out the hat you're after yet), then what are your options? Why, read some cryptic helpful hints, of course!

(Note: the hints are being released in "packs" that go from harder to easier, and later ones may reference earlier ones, so it might be helpful to set your answer sort order to "oldest" while reading this.)

Answer 1

Hint pack 1:

• Solve these riddles and it's yours. (Sound familiar?)
• What's a better hint, the first word, or the second?
• Rejected hat name: "What Are You Still Doing Here?"
• What if Mjolnir were made of gold?
• Mostly a good guy, but not always.
• Not the admiral's most important work, but her most famous.
• Tahiti, 1791.
• It's actually just one dress hat, which will become more obvious in better lighting.
• It's not garbage until it's served its purpose.
• It's important to know your history... in more ways than one.
• One not familiar with the meme might argue that a better name would be "They're Over 9000!"
• Turnabout is fair play.
• Why not just call it "7"?

Please do not edit this or post theories/guesses here. This answer should stay "clean" for others who just want to get hints and work things out on their own.

Answer 2

Hint pack 2:

1. Archimedes
2. Onion Knight
3. It's Always 5 O'Clock Somewhere
4. Odinson
5. Sun Wukong
6. Amazing Grace
7. Edward Edwards
8. Flip Flop
9. Cleanup Crew
10. Flying Tiger
11. It's Over 9000!
12. Hairboat's Revenge
13. 007

The order here matches the order from hint pack 1.

Please do not edit this or post theories/guesses here. This answer should stay "clean" for others who just want to get hints and work things out on their own.

Answer 3

Hint pack 3

This includes all of the contents of hint packs 1 and 2, so if you're late to the game and wanted just the harder hints first, start with the other answers!

Archimedes

• Solve these riddles and it's yours. (Sound familiar?)
• Running naked through the streets of Syracuse is strongly discouraged, and neither I nor Stack Exchange are responsible for the consequences if you choose to do so.

Onion Knight

• What's a better hint, the first word, or the second?
• The first. It's the first. So, how do onions make you feel?

It's Five O'Clock Somewhere

• Rejected hat name: "What Are You Still Doing Here?"
• Zoom in real close on this one.

Odinson

• What if Mjolnir were made of gold?
• It'd look something like this.

Sun Wukong

• Mostly a good guy, but not always.
• What's a place where a little bit of argument and controversy might be a good thing once in a while?

Amazing Grace

• Not the admiral's most important work, but her most famous.

• 

  (photo from Wikimedia, in public domain)

Edward Edwards

• Tahiti, 1791.
• Why would the hat be named for Captain Edwards and not the more well-known Captain Bligh?

Flip Flop

• It's actually just one dress hat, which will become more obvious in better lighting.
• Remember the first footnote in the Winter Bash 2015 announcement blog post.

Cleanup Crew

• It's not garbage until it's served its purpose.
• How do you know when a comment has served its purpose, anyways?

Flying Tiger

• It's important to know your history... in more ways than one.
• Well, really just two ways. (What? Two is more than one.) Earth military history, mid-twentieth century; and Stack Exchange Winter Bash history, 2014.

It's Over 9000!

• One not familiar with the meme might argue that a better name would be "They're Over 9000!"
• This hat can be earned with either quality or quantity (we prefer quality).

Hairboat's Revenge

• Turnabout is fair play.
• Who ran Winter Bash last year, again?

007

• Why not just call it "7"?
• Each individual digit has to account for something.

Please do not edit this or post theories/guesses here. This answer should stay "clean" for others who just want to get hints and work things out on their own.