I'm not all that brand loyal (voted option 3). My family will drink either in a restaurant with no problem. However, I do not drink regular Coke or Pepsi, only diet. My husband only drinks diet soda as well. BOTH of them taste sickly sweet to me.
My absolute favorite soda in the world is Cherry Diet Pepsi...it's pretty much all I buy at the store unless there is a REALLY good sale on diet Coke. I have gotten my husband and several friends hooked on Cherry Diet Pepsi...love that stuff.
I can tell you that when Pepsi did their "Throwback" soda this past spring (it was Pepsi with REAL sugar, not High Fructose Corn Syrup) my kids LOVED it! They have never said a word about soda brands, coke vs pepsi, etc. before this. All of them kept saying how much better the soda tasted and asked if we could get this soda all the time. They were really dissapointed when I could no longer get it.
In Ireland, my brother and sister in law who drink regular Coke, kept commenting that the soda was so much better there than in the US when we went a few years ago. I thought they were crazy, but I only drink diet coke, so I didn't taste a difference. After we were back I read that both COke and Pepsi make soda with no High Fructose Corn Syrup for Europe and other countries that don't allow the HFCS in their countries. I had wondered if that's why my family loved the Coke so much in Ireland.
When my kids raved about the Pesi Throwback, I became convinced that HFCS tastes like chemicals compared to real sugar. It's a shame you can't buy it all the time.