Are you ever afraid of becoming your parents?

I think I feel that way more than ever now. Whenever I see my brother and sister, like this past weekend, I secretly wonder if they think some of my attributes are like my mom.

I try very hard not to be like my parents. But sometimes, especially when my brother or sister is in the room, I feel like I have mannerisms that are my parents' and not my own. I hate it!

How does one shake that?