why
A kid I worked with in highschool convinced me to play the trial after we talked WC lore for weeks. Less than 10 levels into the game I was hooked and getting my own copy. Having come from all of blizzards other series I knew WoW would be perfect for me. 5 years later its still the game I spend most time on. Probably from all of the friends that have been made.
which race
Nightelf, simply because they were the only ally Druid
which class
Druid. There was no other option. I loved the idea of being a shapeshifter. Using a bear to protect my allies. Still to this day my druid is my favourite, may not be my current main however.
why alliance
I think it mostly came down to the idea of Tauren looks versus NElf looks and chose to side alliance because of it ^^