system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What makes us interested in something?

I mean, what happens in our body that makes us enjoy things we are interested in? And why is it that I can be interested in one thing but someone else wont be?
gpt
We develop interests through nature and nurture. You might have a inquisitive personality that makes you attracted to books or an analytical mind where strategy games pique your interest.

If you had a dog growing up and it was your best friend you might like dogs and pets in general. If you had a dog growing up and it bit you once, you might hate dogs and have an irrational fear of them.

If you're a younger sibling who got involved in a specific sport because your older brothers/sisters were competitive in it, you might have just been a part of it long enough that it became an interest. Humans are adaptable like that.

Once you have learned the skills necessary to indulge in your interest, your brain will reward you for feeling successful the same way it does in other ways: dopamine!

It's far too complex an answer to say exactly how an interest is developed.