I tell my kids "I love you" when they wake up, when they leave for school, when they go to bed at night, etc. It's second nature to me to say it and I love to see them smile when they say it back to me, too. My husband thinks it's weird, though, and that I'm making our boys weak by saying it and expecting them to say it back. I don't MAKE them say it, they just do, and I don't see anything wrong with it anyway.
Do YOU say "I love you" to your kids a lot?