How can they be so different?

Everyone tells us that Olivia looks like her daddy and Kristin looks like me. Ok, so I can understand how kids look different, but at times in their lives they look the same. What I cannot figure out with my two girls is how can they be SO different in their actions. They both complain and both whine like normal children, but Olivia is just yucky! She licks things (not suckers either), she has stuck her hand in the potty, she picks her nose, she has bitten, she will pick anything up that looks like food and eat it, I could go on! Kristin never did any of those things. I mean I'm sure Kristin probably picked her nose, but once I told her to stop, she stopped! She never bit anyone, she's never stuck her hand in the potty, and overall just thinks those things are yuck and always has! I just don't know what to do with Olivia. She's still putting so many things in her mouth and she'll be 3 in just a couple of months. I know recently she was teething with molars, so that I understand, but those teeth are in now! So, mom's out there, what do I do?? I would love any suggestions other than putting her in time-out and spaking (I've already tried those!)