It's the small things that were taken away as "quality of life improvements" that made me feel special playing my class. As a rogue I had to brew and carry poisons, I would make Thistle tea, I would spend effort leveling my lockpicking (it took enough effort that most alt rogues wouldn't bother) and then helping people in cities pick their boxes or I could pick a lock that normally needed a key to enter, I had my swirly ball, and I would occasionally go visit Ravenholdt (even though there was nothing there). It all added to immersion and attachment to my character, which I played as my main form my first day in vanilla to my last day when I quit in Cata.