Yesterday was a complete bust. To catch up, I had to do two posts yesterday, and two every day (except over the weekend, when I rarely post anything at all) and now I'm even further behind. It's possible (although not likely) that I can do four posts today and get caught up. More likely, I'll do three today and three tomorrow.
Or, if it keeps slipping, I'll be late and sneak a post or two in after the month is over. But I hope to not get that far. In terms of today's question, I honesty haven't ever been all that fond of the notion of color-coded dragons. I don't mind some variety in dragons. Sure, fire-breathers (i.e., the reds) are the classic, but appearance and abilties shouldn't necessarily be in lockstep. And I do quite like some of the other breath weapons. Frost/white dragons having a cold breath weapon only makes perfect sense, and some of the other options (especially dragons who spit out a big ole honkin' lightning bolt from their mouth, which is just plain cool) are attractive.
Iron Kingdoms has done dragons the best, in my opinion. Every dragon is a singular entry. They don't just have their own abilties, but they're got a lot of other variety and personality to them too.
So, in that sense, I'll have to break my own rule (maybe its really more of a guideline, given that I break it frequently) and quote a third party source. My favorite dragon is Lord Toruk.