While I have been playing WoW since I can remember, my experience with Vanilla has been... surprisingly lacking. I started playing in TBC, and didn't get seriously into it until WotlK, so Vanilla was always to me that mysterious part I never got to see myself.
That said, I have been playing Classic since release, and I find it quite fun myself I grew up playing grindy stuff, so the Vanilla playstyle is right up my alley, even more so as I'm leveling a warrior, currently at lvl 44. Pretty tedious at the start, more so than other classes aparently, but it snowballs out of control if you get it properly geared, and playing the AH really allowed me to have a "comfortable" experience, with a mount, good gear, and more of that