I have two boys. One is 2 years 9 months (about) and the other is about 11 1/2. Besides them both being boys with reddish hair and big for their age (and darn tootin' cute/handsome), they are sooooo radically different from each other that it's hard to believe they can be from the same parents or the same household. It's almost unbelievable. Some examples: Son one ate early and ate EVERYTHING - no problems. Son two, started eating late and won't hardly eat ANYTHING. Son one loved to play with blocks and building toys. Son two, can take them or leave them - no interest. Son one didn't even want to touch paper until he was close to 5 years old. Son two is OBSESSED with drawing and coloring and writing letters. Now, they both talked early and with good, rich vocabularies, but Son one was easy to understand, son two is difficult to understand. Son one was never very polite or very mindful of people's feelings. Son two is keenly aware of people's feelings/moods and is extremely polite. Son one has always been a walking tornado. Son two is a neat freak. Son one hated the stroller. Son two loves it. It goes on and on and on. It's almost a given that they will be different. Now, more than ever, I believe that we come into this world mostly preprogrammed and the home environment can mold some traits, but that's about it.. I'm just curious though. Have you noticed the same things?