Hello and happy Muse Monday! I'm so sorry, but I couldn't resist. Selene, what could you tell me about the dragons of your world? And have you/the others ever encountered one? 8)
*Selene grins and immediately summons a large stack of books onto a table* Right then, let's get started.
The origins of dragons upon the world of Titan are actually a little shrouded in mystery. The creation myth of our world dictates that the dragons were created by Kilanirax, the King of Dragons, in collaboration with Glantanka, the Mother of our world. This seems to bear out for the vast majority of dragons on Titan, though there are some exceptions to that rule, but I'll get to those in a minute. It's unknown how many dragons Kilanirax created, but among them was the Night Dragon, the first dragon to be corrupted by Evil. How many of his kin followed suit is also unknown, but many of the most evil dragons in our world are likely descended from the Night Dragon.
We tend to group dragons by the colour of their scales as this is the easiest way for the layman to identify the various types, though each colour is also distinct physiologically and each has a reasonably distinct breath weapon- though some subspecies share an elemental type, the way the breath weapon is utilised between the subspecies is still reasonably distinct. Each colour grouping also has distinct personality traits that they share with others of their subspecies. However, there is still a degree of variation between individuals in each subspecies, as the dragons are an intelligent and fully sapient life form fully capable of speech and wielding magic. All subspecies are grouped together into two distinct cohorts, chromatic and metallic, with the chromatic dragons being generally considered evil and descended from the Night Dragon, while the metallic dragons are considered at least neutral to the rest of the world and are descended from those First Age dragons that remained uncorrupted by Evil (yes, there's a difference in this world between ordinary evil and the Evil that caused corruption in our world. That is a whole other story I'm not going to get into right now).
There are rumours that there are Gem dragons around as well, though where they have come from is a hotly debated topic. I have it on good authority that at least one of them seems to have been a direct creation of Throff and may be the only example of a First Age Gem Dragon on Titan, with the others theorised to have arrived when the Outer Gods (Pelor, Correllon , Moradin etc) found our plane and took on followers (just don't ask me when that was, it was enough of a headache trying to avoid another dwarven religious war from breaking out when Edwin and I told the dwarves of Fangthane what we found in the God Vault with the portal to Mechanus in it). Other, more elementally-aligned, subspecies of dragon are also found here and there, though it's obvious they've come through minor portals and tears from the Elemental Planes.
As far as dragons I've met, there are a few. I never got to meet Kypris myself, but I did get to meet his mate and numerous children during my first adventure, though Alexis did recall her interactions with Kypris quite fondly. Then there's Karlylax *shivers*. Karlyax was a Dracolich, one of the most evil creatures I've ever had the displeasure of meeting, and he was the one responsible for Kypris' demise. So, naturally, we were asked to find and destroy him. We did, after an extremely hard fought battle and, hopefully, he will never rise again.
Then there's Old Red, the dragon that took over Firetop Mountain and is Toreguarde's comparitive neighbour. He's not exactly pleasant, but we did manage to make a deal with him to protect the area around his mountain during the Demon War. I don't think he's entirely happy that Drakemar came along and took Toreguarde as his own. I think the two of them have some sort of history with one another, though I'm not stupid enough to ask either of them about it. I value my life as it is a bit too much to risk it.
While not common knowledge, there are some in the upper echelons of the Toreguarde Council (the Triumverate chief among them) that know that Drakemar is a dragon. That's something kept a bit close to the chest though, as most people dislike the idea of a Red Dragon, in particular, having any sort of authority over their lives. Not that Drakemar actually has anything to do with the running of Toreguarde besides taking taxes these days, but he does come along to protect the city if the need is dire enough, and he's not busy defending Wyrmholme.
I did meet Silver and White dragons during my adventures too, and visited the lair of a Green dragon by the name of Arakas at one point.
Then there's Harbinger, a dragon that likely came from the Elemental Planes during the recent Ragnarok Event. He was an ancient Pyroclastic dragon, and he set about trying to level Toreguarde to the ground, starting with the wizard's tower and the surrounding area. It's only thanks to Elowyn and her friends that only the Wizard's Quarter sustained any major damage at the time.
Of course, I can't forget Aurianna either. I don't know much about the hows and whys of the link she shares with Elowyn (you'd need to ask them directly), but she is the dragon I have the most contact with these days, even if she's normally in the form of a cat.
I'll be happy to waffle on some more if required, but that covers the basics of your question, I think. I hope my answer was useful to you.