Darn, when I saw the title of the thread I thought you wanted opinions of the lifestyle of a neonate..... Since, I've answered the other question enough on multiple threads (it's somewhere between that of an EM doc and that of an OB/Gyn), I'll address the lifestyle of a neonate.
Basically, I don't remember it very well, but I was bottle-fed so it probably wasn't nearly as much fun as that of the breast-fed baby. Lots of sleep time and you get to wake everybody in the house up a lot. The colic thing doesn't seem like much fun and it sure isn't fun being in an NICU, but otherwise, I think it beats the life of an adult pretty handily.
Regards
OBP