Souls games haver some of the best dragon fights. Tell us your favourites!

I'd like to add that Dragon God is the Sultan of Chaos, since its not mentioned anywhere on the internet by anyone. Its in the item description for Firestorm which is a dark magic by Yuria. What that means in the lore is anyone's guess, but its a very interesting title.

My favourite on NG is Dragon God, the atmosphere is forboding and intense and he has amazing design. The music is also great. Gameplay wise the fight is alright, although a bit tedious, which is why after first impressions its less impressive.

My favourite on NG+ and further playthroughs is Gaping Dragon. This is one of the most intense fights in the series and the difficulty is spot on. Its really fun to play.

I never remember the names, but its the one in the Dark Souls 2 DLC. The one that poisons you. I think its Sinh maybe?

Sinh and Kalameet. I really dislike Dragon God and Midir, but for completely different reasons.

Yup. Very well done and actually fun.  Best dragon fight I've had in any game.

Gaping dragon, because he was freakin scary. I'll never forget the first time I saw him crawling up from the depths. "Oh, he doesn't look so bad? Just a lizard thingy right?" *5 seconds later* CONFUSED SCREAMING!

Oh and what made him even worse is that for many first time players, they went into that fight cursed by the damned basilisks. 

Hahaha I had the same reaction. "A small snake? That's kinda cute. Oh...oh wait. Oh no. NOOO!!! What is that?!!" I beat ghim in the first attempt though I was overleveled according to the wikidot site. Still ikt was an entertaining fight.