I used to love the hell out of original and Code Red.
I can't really drink any of them anymore. I've vowed to stay away from sugary drinks after I realized I was drinking too many cans (or fountain refills) a day (of any pop). Once I started working as a busboy in highschool, I was getting fountain refills nonstop and decided this what it, I gotta quit.
My only pop now is diet caffeine free for mixed drinks... occasionally a regular Coke but that's basically once in a blue moon.
As a kid, I remember the original Surge - that stuff was pure crack. Then they brought it back but it wasn't the same. Then they relaunched what was basically the original Surge as an energy drink, lol. That was Vault. And it was delicious.
But damn, I remember downing entire 2 liter bottles of different Mountain Dew flavors at LAN parties in high school. Flavors for those days: OG Dew, Code Red, Pitch Black, and Livewire.