"Isn't everyday Halloween for the INTP, you know with all the masks we wear?"
Bingo.
We made Halloween into a big deal at the office this year to "mask" the fact we're all miserable because of the economy. Turned out to be a heck of a lot of fun. I shaved the beard, died the hair, bought some 90 weight and slicked back the hair into a ducktail, and spent the day as one of my 1950s heros, a Typical Greaser. Got to say "Huh?" and "Whuh?" in response to all questions, sneered at everyone, and generally had a fine time.
Then I found out it wasn't "rinse" in my hair, but permanent dye. Annoyed for a moment, then reaffirmed my INTPness by telling myself "Hey, if you don't care what people think, dude, you DON'T CARE WHAT PEOPLE THINK!" Felt better immediately.