Red is the most recent switch, and not the most common switch types known for mechanical keyboards. Usually you expect something very distinct feel, loud, and feel of typewriter when you purchase mechanical keyboard. So most people consider between brown or blue. They feel about the same, but just a noise difference. Red feel totally different from blue or brown. The feel is different (if you are used to blue like me, you won't know if you r typing or not at first. They keys just push in so easily without middle joint nor blue noise). Red doesn't feel like a type writer nor the loud cool sound keyboard. It's just.. "linear" type. Many ppl looking for mechanical keyboard don't expect something that sounds or feel anything realted to membrane, but much distinct. So Red and clear are not that popular yet. But now I am typing with Red, it's great. Actually I didn't really expect much from Red. I just decided to try out Red since my fingers feel 55g of force too strong for me, I decided to go with 45g. At first, it feels very boring compared to blue or brown. But as you get used to it, you will find its own appeal
. Overall, all the switches have its own uniqueness and the preference just differ from person to person