Classic is perfect in it's own broken and unplayable way, but Blizzard crapped all over the 2019 release so it sucks, I'm playing this version on a private server and it's a better experience.
I could have gotten 3 engineering titles in the time I spent playing WoW. So yes, the game was really really good and very addictive, the last expansions suck and will never be what I want them to be. But about the original vanilla WoW, it's fun but clearly unpolished, they fixed it on the re-release but still, I didn't enjoy it as much as WotLK or Legion.
I could have gotten 3 engineering titles in the time I spent playing WoW. So yes, the game was really really good and very addictive, the last expansions suck and will never be what I want them to be. But about the original vanilla WoW, it's fun but clearly unpolished, they fixed it on the re-release but still, I didn't enjoy it as much as WotLK or Legion.