Why Do I Like That My Little Brother Copies Me?

I mean, honestly, it's kind of flattering that he looks up to me and wants to be like me. But sometimes it can get a little much. Like when I was trying out for the school band this year, and guess what? The next day, my brother comes home with his own trumpet because apparently I'm 'the coolest big sister ever' now. It's not that I don't want him to try new things; it's just a bit...overwhelming sometimes. Plus, there are days when I just want to be myself and do what I enjoy without the pressure of being someone else's role model. But then again, isn't that kind of part of being an older sibling? What do you all think? Am I the only one who finds it a bit daunting?