I got both TBC and WotlK, also played for 4 years but enough is enough at some point. Although I still absolutely love the lore and stuff, I think the game has changed to much for me to still enjoy. Longing back to the good old days of vanilla WoW sometimes, 40 man raids, chaos on teamspeak and massive cheers when we killed a boss for the first time. I wouldn't mind hopping on my flying mount just to see the old world from above once or perhaps see the worgen starting zone but other than that I am definitely done with WoW.