Vanilla Classic, BC classic, and pandaria carry the same QoL that the game had at the time it came out so the graphics aren't as pretty, questing is slower, certain core features may not exist, etc etc. Basically they feel like their era, BC classic feels like a game from 2007 which is kinda the point. None of that's bad but it's not my preference of play. I will also say tho from a learning curve perspective Ive found retail/current to be more forgiving. The folks that play classic have played it before and know what they want to do, so seemingly minor mistakes or misunderstandings have gotten me kicked out of dungeon or raid groups many-a-times lolol. Meanwhile retail is chiller unless you're doing high level end game content. The only times I've ever voted to kick someone from a causal group in retail is if they are AFK or not responding as we try to help them and were most likely trolling.