Favorite Dragon Color/Type
Of all the dragons, the ancient red wyrm probably has the most iconic feel for me, because Smaug. (Though I can’t remember how Tolkien specifically described Smaug in The Hobbit, his own illustration was the cover of the first version of the book I ever owned, so I consider that canon.) However, my personal favorite in game terms (talking D&D 3e and up, where dragons began to be broken out more fully by age) is actually the red wyrmling.
I love the red wyrmling because — as the toughest of the wyrmlings — it makes a nice challenge for a neophyte party of 1st-level characters whose players might otherwise have assumed they’d have all sorts of time to level up before facing a dragon. Silly players should have paid more attention to the name of the game.