I remember buying and creating my character and being blown away that first night. BUt my most amazing experience in all video gaming ever in my entire 32 years on this Earth was the first time I decided to take my Night Elf sailing from Auberdine to Menethil Harbor at level 15 to learn 2 handed sword training from Master Woo (or was it ping?), and the walk along the road up the mountain tunnels through Loch Modan and Dun Morogh ultimately to Ironforge and to Stormwind via the tram.
I had never seen such rich and diverse terrain in a full sized free roaming world that made me feel like i was living in a Pixar movie, the way the land changed and the foreshadowing of seeing ruins from miles away you'd later be under,... the vistas. The atmosphere. For the very first time I felt like I was actually living and exploring a fantasy world, something no video game had ever done. Everquest tried, but the graphics were boring and sterile and generic.
Every new zone brought with it brand new different kinds of trees and bushes and soil patterns and music and atmosphere that was so distinct, i was absolutely in fucking heaven, totally captivated. Nothing has ever come close.
Maybe the Oculus Rift and virtual reality will give me an experience on par, but perhaps being 24 in 2004, being this old I'll never ever feel that way again about a game. A depressing thought.