Basically I mean anyone who has not played the original version of vanilla/tbc/wrath so nostalgia isn't a factor, how did you get into playing the classic version right now (and probably upcoming wotlkc) and what are the reasons that have you coming back/stay?
I couldn't get into it in tbcc mainly due to gameplay reasons (because compared to modern games... uh. yeah...) but I've seen plenty of colleagues my age (early-mid 20s) take up an interest or already playing for some time now, with wotlk also getting a bit more spicy in terms of class and boss design (unless you play arcane mage xd) it genuinely piqued my interest as well.