One of my favorite smiles in the whole world:

I remember when Lucas was a newborn I started to get worried when it took him longer than Lilly to first smile. I even told my pediatrician about it, who quickly reminded me that he wasn't even supposed to be born yet (they were preemies), so I should calm down about it a bit. And sure enough the smiles did come.

Lucas held me in suspense for awhile, but, oh, it was well worth the wait...

Lucas' chill smile:

Content Grin (I love this one because I know a big smile is about to pop out any second):

Silly Smirk:

And my favorite, the I'm-so-happy-I-am-about-to-explode look:
I love you so much Mr. Lucas and can't wait till morning when I get to see your great smile again!!!