So you're obviously not a parent, since you're not understanding that every parent sees your comment, agrees and thinks: Yeah, but I'd rather be a parent. :-)
Actually, I am a parent and both of us, while we love our children and love to see them grow, are still tickled to be done with diapers. And when I hear a kid whine or a baby cry (out in public), it is music to my ears; That is not my kid crying, I don't have to do anything about it. A bit selfish yes, but an honest and natural feeling.
I've always approached those stressed out midnight feedings and diaper changes with enthusiasm though. Every time I take a look at my crying son I think: these are the times I'm going to remember when he graduates, gets married and has a family of his own.
If you really get stressed out with the crying and sleeplessness, just take some video or pictures being "cranky". That's what I did. It became a significant stress reliever.
