Ebullient… I also like loquacious
I like to be both at the same time. Syzygy is a really cool word, too. I don’t think you can spell it in Scrabble[sub]TM[/sub] though… Not enough 'y’s?
Gotta go with defenestrate. That, and flinge
Knowledge.
Seriously, it’s my favorite word. Rolls off the tounge well, and just seems like a meaty, hearty word. Plus it’s dignified.
Mine is cataclysm. I even like cataclysmic and cataclysmal.
Er, that would be “tongue” instead. Which is also a good word.
Yes, a good, good word. 
either Callipygian or Melcryptovestimentaphilia
Superfluous, Oft (although not in the O Brother Where Art Thou use), and Mellifluous, which I never use.
Hands down, defenestration. I love the specificity of it, as well as the implied violence or contempt.
If you like defenestration, you should also like vapulation and suggilation.
Personally, I prefer formication.
so many to choose from…
they go in stages, but I would have to say: perturbed; and another all time favorite: Sassy 
as always, it’s ** monkey **
Hmm. Elegant… and optimal. They’re so succinct, and they sound like what they mean, too.
Flabbergasted!
Best word ever.