The thing that strikes me is that I really think the writers love and ENJOY writing Dair. Two talented actors, two well fleshed out and likeable characters, great chemistry, clever dialogue. Compare it to Chair - they were an accident, and you could literally see the writers struggling to come up with genuine conflicts and storylines for them. Season 2 was horrendous. You could tell that they were trying to put off Chuck and Blair becoming a couple for as long as they could, because their entire appeal rested on the will they/won't they dynamic. They kept throwing ridiculous obstacles at them and piling on OTT angst on Chuck's character as an excuse to keep them apart. Once they did get together in season 3 it was only a matter of time before they fell apart. They were too alike and did not challenge each other or make each other happy the way normal couples do. They were incredibly dull together and intelligent Blair was reduced to playing sex games with Chuck in order to keep him interested.