Hey Echostorm,
Congratulations mate,
I too have girls one 3 years going on 16, and one 4 months. If I'd have known before she was born, I would have said to you enjoy your last sleep in, enjoy your last coffee in a cafe, enjoy your last movie at the cinemas and your last restaurant feed.
Aside from that, it's one of lifes great joys and as Reli said, stresses. Oh and by the way, your missus is likely to get a little feral with lack of sleep for the next 3-4 months, just roll with it.

Have fun with her,
good winds,