I always thought I would be surprised by baby poop, or weird wake up schedules, or growth rate, or the way he crosses his eyes... but the thing that *actually* surprised me was when we went through out first box of wipes and I was like "WHAT? these things run out?" and we had to go to the store.
It was only a 64 wipe pack--I don't know why I thought that would last me forever but I was completely surprised when it ran out.
Everything else that happens may be "different than expected" but not actually surprising. Weird.
What surprised you most about your LO?