I enjoyed Vanilla because there was a stronger sense of community. Levelling up to 60 was part of the experience and I believe the fastest recorded time on Blizzard servers was 4-5days /played time. People would buff you, help you fight those bastard murlocs that ruin your life, you would make friends doing literally anything from questing to getting a group together for dungeon runs. That awesome rare you got from Deadmines would last you another 20 levels. It was relentless and you always had to look over your shoulder for the opposing faction.