Web design today, is a tricky thing--if you're not trying to sell anything.
Most design today is focused around selling either products, yourself (think portfolio), or advertisements. The web is mostly a sales platform. SEO is the be all and end all of modern web sites.
When I started playing around in the internet, making my first website in the late '90s, I didn't have any of that in mind. I just wanted to make a website becuase I thought it was cool. My own playground! I can do whatever I want! And that I made this feeling. Learning HTML was exhilarating. I didn't know how to programme back then, but the fact that I could create something was incredible. And that feeling is what lives on today in my website.
You won't find any ads here. Nor am I trying to sell anything. So, there might not be a clear focus as to why I really have a website, as far as modern reasons go. I just have it, to have it. My own playground, to do whatever I want, however I want. I'm also not a fan of flat design, so this might not be a good lesson for modern web design.