Disclaimer: this is an opinion piece.
When I first joined the mechanical keyboard world, I was pointed to cherry browns by basically every source I read. The pros were good and there were few, if any, cons. Light activation, not too hard or soft, with a tactile bump that provides feedback without being as noisy as blues. Sounded perfect at the time so I went ahead and bought a keyboard with cherry browns.
After spending some time with the browns and getting some more experience with mechanical keyboards, I noticed a few things about the browns.
They really are great for a starter switch and they're readily available to US buyers.
The tactile bump is almost impossible to feel when typing quickly. Because of this, it provides no real feedback at normal typing speeds.
After some time, the bump begins to just get in the way of a switch that essentially functions as a linear switch. It feels like the key press is rough or grainy part way through the travel. I'm left wishing that the bump simply wasn't there.
I finally confirmed my thoughts today. I took a visit to Cleverly 2 in Akihabara and was able to test the switches side by side after finding a 10keyless in cherry red. After playing around with it, I realized that this was the switch I wanted my browns to feel like. The reds kept the nice, light, responsiveness of the browns and did away with the crappy bump that I had started to resent. They really felt great.
I honestly think the only reasons why more people don't recommend reds are that they are not as readily available as browns and an a result, fewer people have tried them. I still think browns are a great switch as an introduction into the mechanical keyboard cult. They're light, but not too light, responsive, not overly loud, and easy to find. But the next time you feel like grabbing a new keyboard and default to you standard browns, I entreat you to take a little risk. If the choice is there, take the reds.
TL DR: reds>browns *puts on fire suit*