Settlers of Catan...

Have you ever played Settlers of Catan? I started playing this game when I moved to Indiana, and I am warped into loving it. The thing I like about the game is that you can make the board yourself or follow one out of the book. Also, you can EXPAND and I mean expand, like there is Seafarers, Cities and Knights, or a combo of all of them together. You can make the game as big as you like or as small as you like.
The reason I bring this up is... I want to know if other people have ever played it or like it as much as I do. Also, if you have never heard of this game before... I am warning you that I will most likely convince you to play it sometime with me.