My first daughter was an amazing baby! I wish I'd realized at the time how easy I had it. She slept pretty much through the night from three months onward. We never knew she was teething until she popped out a few more pearly whites. She was always happy, she rarely cried, and there were rarely issues with her health.
My second daughter however, made me realize how easy I had it with my first. At just over a year she still doesn't sleep that well through the night. It's as though she's constantly cranky and in pain from teething. She also is fairly happy but she cries A LOT. She doesn't like to share, and she gobbles up food like she's starving, hasn't been fed for days and is afraid of when her next meal will be. Not to mention, we had issues with reflux and my poor little darling used to cry in pain every time she pooped, no matter how many different variations of prunes we shoved down her gullet.
It's hard sometimes not to compare our kids, but we have to remember that they are outstanding, outrageous and original. They are perfection just as they are.