Just hit 110 and started levelling on alliance, I must say, I really like Anduin, really don't understand the hate.
What's so bad about having a kind and optimistic leader? And he is written to be quite intelligent, which is cool, since he is not the Grrr, roarrr, smash warrior type.
He is the type of leader a kingdom would want, good, kind hearted and wise. He isn't afraid to step up either to fight, but only if he absolutely must. Also willing ot offer his enemies a hand if it would help bring peace of if their plight is just.
This is the type of leader you really want. Why the hate? He also looks cool in the cinematic.