What is the best game World of Warcraft or The Sims 3?

I have never played WoW, but I have Sims 3. Sims 3 is very fun, but if you play too much it can get boring because there is no story mode, just goals you have to accomplish. I rarely play where I control the people anymore. I am always building houses whenever I play Sims 3 now, but I play like everyday bc im on summer vacation and I get bored a lot. If I don't play in a long while like a month or two and then play again, it gets really fun and addictive again lol.