This has to be my favorite. Walking into Aden for the first time made me seriously stop and look at the big buildings and beautiful music. It had a truely epic feel to it. This song almost makes me want to play retail L2, but I'm not.
Ragnarok Online 2 has the best MMO sound track of all time, no ifs, ands, or buts about it. It's just... the best. I've never heard an MMO soundtrack that could compare to it.