It really is a crap shoot if you get a baby who is prone to more sleep or not.
MY DS was fabulous. He was on a perfect schedule of nap, feed, play, rinse & repeat. He would reach for the crib at naptime as he got older. He started sleeping through the night at 4 weeks old (11pm - 6am) then 7pm to 6am a few months later.
DD on the other hand.... my god! That girl can fight naps. From the day she was born, we were lucky if she took two naps a day, that's right TWO!. Even now as 7 months old she might take an hour nap in the AM and one in the PM. She goes down at 7pm then wakes for food around 10-11 then again in the middle of the night. She
teased me by sleeping through the night at 8 weeks old for a few days then again a few weeks ago.
Your body
does adjust. If I don't get to sleep until 1 am, she wakes at 3 to feed then up for the day at 6, you just go with it.
And, in my opinion, the first two weeks post partum are the worst. Hormones are still at an all-time high, you're adjusting, healing, cranky, etc. I'm not an emotional type person but I would burst into tears and have NO IDEA WHY!

Just remember, it's short-lived and gets better.