For the "real" building blocks, the older kid LOVES Star Wars bricks, and my younger guy is more into builds like cars/houses/etc. Cloning tends towards Halo and military themes.
To be honest, I'm into it more or less because they are and I get enthusiastic about their things (justifies the expense to my wife). I am, however, also a G.I. Joe fan, and as a result the upcoming clone sets are really getting my interest.
I'll update more about me as I get the time, I grew up in the north and northwest suburbs (lived in Chicago in the 90's) before getting married. I ama career firefighter in the suburbs now. More later, and thanks for the welcoming!