It is, I play it on and off since 2006 [1] (don't laugh at that username, was done as a joke by a friend to get me into the game). You can do A LOT of things and pretty much NOTHING 80% of the time. It really feels like a permanent grind/work type of thing that's why I take such huge breaks from it.
The community is the real deal. It can be awesome or real shitty, just like at work :)). It features great politics, economy, social structures and everything above and beyond to make it, for me, the best game I ever played.