Private MarkTatsu here, my very first WoW character. However, playing in Vanilla isnt much of a credential for a couple reasons. Its been a long time, most of what you remember is going to be mostly correct but human memory is a fickle thing and the biggest reason is that this is not going to be 100% recreation. Even discounting any lost info or bugs, the game will run a lot smoother and with higher frame rate. If you really want the authentic experience I recommend a CRT monitor and setting your frame rate to 15 fps. As I am typing this I am thinking about how a funny challenge that would be 
hahahaha this is gonna be awsome