I am completely stealing Katie's thread from last night, as it got me thinking not only of the changes that my FI has brought to my life, but how he's changed...
What's one (or more) things that your FI/H does now that he didn't do before you?
For me, its caring for my dog, a small multi-poo. When we were dating he'd make little snide remarks on how crazy she is, and how's she's not all that bright or even a real dog. Now, I'll get home and she's napping on his chest.