I'd have to say - three.
But yes, my son is the biggest fan in the house. Which is a bit funny 'cause he's never really seen much of the live action films (he has seen some of the Clone Wars TV show, which I am still not entirely thrilled about but - he and his dad love them.)
I think the Star Wars mythology is pretty universal at its core - knights + bad guys + wicked special effects! I also remember when I first saw the first Star Wars in yes, '77, and it totally captivated me. The concept of the Force and Jedi Knights sustained my little wee self in a lot of ways. I have a lot of fondness for it.
When I rewatched the first film (A New Hope that is, not the new trilogy) recently to screen it for my son I was surprised at some of the things that I find violent for him - and which I loved myself.
My son and I play lightsabers/swords a lot, but we always end it with a hug.
P.S. Jedi knights make their beds, clean up their toys, and help clear the dinner plates; it is an essential part of any young padawan's training. Pass it on to all the other moms!