The Daily Grind: What's the most challenging MMO you've played?

I've played my fair share of challenging MMOs over the years. From obtuse interfaces to steep learning curves to tough-as-nails combat, the myth of MMOs being nonstop faceroll games has been disproven time and again. However, if I had to pick the single most challenging title, it would be The Secret World, hands-down.

Nothing about The Secret World comes easy. The combat has you struggling sometimes against standard mobs, the game's many systems are complex and non-intuitive, the story isn't spelled out for you, and some of the quests tax my brain far more than my reflexes. Don't get me wrong; I love TSW to its core, but it's stupid hard at times, so much so that it's kept me from seriously pursuing an alt.

What would you say is the most challenging MMO that you've ever played?

Every morning, the Massively bloggers probe the minds of their readers with deep, thought-provoking questions about that most serious of topics: massively online gaming. We crave your opinions, so grab your caffeinated beverage of choice and chime in on today's Daily Grind!