My two cents is when it comes to activities and such, a lot of kids are overly focused with “impressing” college AOs, which is extremely hard to do, and not focused enough on “interesting” college AOs, which is way easier to do. Indeed, most AOs are the sorts of people who find kids inherently interesting, because they wouldn’t want to do the job otherwise. So they really WANT to find you interesting, you just have to help them out.
OK, then I think even if kids kinda get the idea of being interesting, they sometimes think that means they have to do something really unique. Again, it is very, very hard to do something truly unique, so that is not a very promising path.
So what is the alternative? I think it is useful to start with the old point about showing and not telling. Meaning you want to show you are an interesting person, not just tell the reader that you are interesting in some way.
OK, so how do you show you are interesting without citing unique activities? Well, I think one really useful technique is to think carefully about incorporating really specific, vivid details. “I cooked breakfast,” is not a very interesting sentence. “I cooked a frittata,” is a little better. “I cooked a butternut squash and blue cheese frittata,” is making me hungry. “I rustled up a butternut squash and blue cheese frittata,” paints a dynamic picture of your cooking process. And so on.
So my bet is if you take some time, including time to go away and come back, with things like activity descriptions, relevant essays, and so on, you can “punch them up” with more specific and vivid details.
My last note is just that if at all possible, you have to have a positive attitude toward yourself. You ARE an interesting person! I don’t know you, but I know you are, because I have not met a kid yet that I did not find interesting once they opened up a bit and started talking without a lot of filters about something they actually care about. I know it can be challenging to convey that in an application, indeed it can feel risky to even try. But I know it IS possible for you, and your readers will appreciate getting to see that.