The end of BC / start of WoTLK was my WoW heyday, I did a lot of semi-hard core raiding during that time, but ended up burning out before we got to the end of WoTLK - something about jousting over and over on dailies was rough, and the content could not come fast enough for us. But ultimately, every time I go try WoW again, the community very rapidly reminds me why I don't want to stay. The community, in general, there is among the most toxic I've ever seen.
I have no desire to go back. I still play MMOs primarily, and in fact, the one I play now may as well be a WoW clone. But the community in my current game is the polar opposite of what I recall from every time I've tried WoW.
WoW had it's time and place, but I'm over it.