I'm hopelessly addicted to Civilization 4 (Civ4). The breadth of game play and possibilities is astounding. However, being a newb means I have a lot of hard work to become a better player.
For example, reading over the Civ4 "War Academy" at CivFanatics.com is not something done over a 15-minute break at work. It requires an entire day worth of note taking and a fundamental re-working of the idea of micro-management.
However, none of the knowledge from the War Academy is needed. A player can kick back on a lower difficulty setting and enjoy the game just as much as someone going for a Space Race victory on a hard mode. I've spent my entire first two games on the default difficulty mode, but it doesn't take long to realize that I'm dominating the field.
I've had fun in Easyville, but I want a challenge, so I'm kicking it up a notch. That means a lot of reading and learning. It feels good to have a game that makes me think again without needlessly throwing barriers at me.