I'm getting quite sick of it.
I think extreme nostalgia is something that is killing gaming today in general, but it's especially bad in WoW. Something that stated out in Classic/BC is changed for the better? LOLITSUCKSBC/CLASSICWASBETTERBLIZZISAJOKE. Every single little damn thing that is changed is automatically slammed by idiots with rose-tinted glasses JUST because it's different from something in Classic/BC. I'm rather sick of it.
Some nostalgia is fine. Heck I have it sometimes while exploring through Northrend, we all do. The thing that annoys me is when people are downright OBSESSED about every single little thing that happened in BC/Classic (even though most of it has to deal with the people they played with), and refuse to accept ANY change to that model, even if it's obviously better.
Extreme nostalgia BS is one of the things that's killing the game the most.