I used to, mainly because my parents couldn't afford to get me a smartphone. I thought it was the
coolest thing ever to own a flip-phone but nobody else thought that way
I eventually got smartphones, I feel bad that I forced my dad to buy me ?100+ smartphones that he couldn't afford just because I cared too much about what other people thought of me. I get teased for owning an iPhone 4s by kids with
much more money than me (second-hand, because that's all we could afford) but it's a reliable phone and it does it's job at least.
I don't think there's anything wrong with owning a flip-phone.