What do you consider mature? I am in my 50s; that's what I think, "I'm in my 50s". I don't associate my age with being old, young, mature or immature. My choices in makeup are different now than when I was in my 30s, but my tastes have changed. I think all of our tastes change more than once throughout our lives.
Since I was 15 years old, I have never been one who liked to wear a lot of makeup. I've experiemented with more makeup over the years, but always felt like I was not "in my own skin".
I have always liked to wear a pinky-brown shade of lipstick. In the summer, I like a pinky-bronze. I'm comfortable with that, it looks good to me and I think that's what is most important. Is it a "mature" choice? I have no idea...I'm in my 50s.