No circumcision. "Doctors" will come at you left and right asking to cut the penis. They'll even wait until you're out of the room to try and pressure the mom into it. On a more practical side, the first few diapers changes are a total mess. And it'll be your job to change those because your wife will be in a bed. Don't look like a pansy and make the hospital staff do it. Forget about getting an uninterrupted night of sleep for at least for a few years. Figure out with your wife how to manage that so neither of you are too tired to function. A common issue with newborns is acid reflux. It can happen from breast milk or formula, and it sucks for the baby and everyone around. They won't be able to sleep laying down for long and tend to just scream a lot until you rock them to sleep in a more upright position. Just be on the lookout for it and don't go for weeks or months before telling someone that can give you a prescription for an acid reducer.