Best Feeling in the World?

So, what is the best feeling in the world, exactly?

Is it when BFF's baby girl starts smiling at exactly 6 weeks on the dot and subsequently makes hilarious faces as she imitates you monkey-facing her?

Potentially the best feeling ever.  Especially with a bonus appearance by that cute baby tongue.

Or is it when she smiles in her sleep and melts your heart... and it's so nice that those smiles are a little longer and slower, because she's a fast little bugger.

 But I'm pretty sure the best feeling in the world is when she sleeps for 2 hours, completely passed out and sprawled out on your chest and completely lost in dream-land.

Yep, pretty sure that's the best feeling in the world.  I keep telling myself that next time we hang, we're gonna take some fun pics or do arts and crafts... but seriously, how can I turn down a nap and snuggle?

I'm powerless.