I honestly never thought about personalities until my children got a little bigger. My son is almost 7 and my daughter is 4, and their personalities are starkly different.

Both are apprehensive towards strangers, but my son is the life of the party once he gets comfortable around strangers. My daughter is more of the shy type.

My daughter is also quite aggressive and has a temper, where my son is the more docile and agreeable of the two.

My son does not lie, even if it gets him in trouble, which I admire deeply. My daughter...she will throw something at you, with you watching, and then deny it ever happened...

It's interesting how different they are, and at the end of the day, they get along wonderfully. If only they would pick up their toys...