insomniac17 on 27 April 2009
I'm going to agree with the OP and say LBP. There's just so many levels; it's really impressive to see what people can come up with. Plus, it's great fun to play with friends in Create mode... I've never made anything useful in there, but it is fun!
I also like to see what I can come up with in the level creator. Sometimes, I'm surprised by how well things work out!
EDIT: Actually, I think it's a tossup between LBP and Age of Mythology. As much as I love Age of Empires II, I have to say that I've had a ton of fun with AoM, and I think I'd spend more time with that in the long term than AoE II.
