Action based combat makes Wildstar fun and fast paced. You can miss with any ability as they require aiming and timing for many to hit. No tab targeting press and forget attacking here, which makes for interactive and fulfilling combat.
WoW is the defacto MMO, almost every MMO created after it came out has been influenced by it in some way. Still to this day it is one of the most played MMO's online and has one of the largest brands tied to its name.