The Greatest Dragon In All Of Fantasy?

Having figured out just which were the biggest dragons of all (with the help of this handy chart), another question arose: Which was your favorite?

Commenter TemporalSword kicked off the discussion with a question:

Hmm, I see a lot of comments about dragons they missed. Seems like an excellent question of the day: Who is your favorite dragon of all time?

I'd have to go with Tiamat, myself, harkening back to my DnD days. She was just the biggest, most badass dragon to test your might against (and I do believe we lost that day).

So what do you think? Make the argument for your favorite dragon — and what it is that gives him or her claim to the title — in the comments now.