My first daughter was a tame child. If you left her somewhere as a baby, she would still be there when you came back. She walked at one year and did not give me many headaches. She did not get into things other than her toys and she was generally happy and content with her situation.
My second daughter was my Tasmanian devil. At eight months she walked. At one year, I found her on the counter reaching for the top of the fridge because she knew candy was there. At nearly five, she has learned to calm herself down so I don't have constant panic attacks. Now, my baby has found her way in the world. Yesterday, I found her standing on the kitchen counter, looking in the cupboard to get graham crackers for a snack. After I asked her to let me know when she wanted a snack, I added Tylenol to my shopping list.