What's y'all favorite soda/soft drink

Im at a point in my life where I try to drink less of that kind of stuff, so when I do I usually choose quality over quantity and pick some smaller brand making good stuff.
My usual is a brand called Lurisia. I especially enjoy their Chinotto, which is mostly caramelized sugar and a bitter aromatic citrus fruit, or bitter orange.
- Me too. I miss my youthful metabolism.
  For the past couple of years, I've been grooving on Ramune, that Japanese drink in the glass bottles with the marble. It's just sugar-water; the flavorings are mild, there's no caffeine, and it's pretty sweet, but it's fun and tastes good. My Cub Foods carries it in the "foreign" section, and I'll get a bottle a couple of times a year. It's the only sweetened soda I drink.
  We do drink a fair amount of soda water; just plain, unsweetened, unflavored carbonated water, but I don't think that counts towards OP's question. Gerolsteiner, mostly, but also non-mineral ... Gerolsteiner has a taste, being mineral water, which I like but not so much with meals.

I rarely drink soda, but when I do it's a Jarritos tamarindo.
- Gotta be the grapefruit one for me but Jarritos is the exception to my soda ban as well.

Enjoy probably :3 specifically the lemon, lime and mint one
Either that or the cactus and lime Rasa
And honourable mention to kvass (any brand tbh)
- Latvia or Lithuania, made in.

Kofola, of course.
- I avoid soda, but if I absolutely had to choose in a lineup of the usual and kofola was included, it'd definitely be kofola.

Real (actually brewed) root beer. Not to be confused with root beer flavored syrup mixed with carbonated water, which is 99% of what's available.
It's hit and miss depending on the source, but when it's a hit... chef's kiss

Faygo. Specifically either red pop or cotton candy. There used to be a single gas station at basically the far edge of town that sold it and nobody else had any Faygo whatsoever. Then at one point, a little convenience store right across from my favorite movie theater started carrying it when a new store took over. It's real nice on the rare occasion I have it.
- The blue cotton candy one is pretty damn good.

Cheerwine is some tasty stuff, and for the most part it isn't readily available in my part of the country, so it always feels like a special treat when I do find it.
Otherwise A-Treat is out local soda brand, and their Sasparilla and Birch Beer are the taste of my childhood.
- Can't believe I forgot Cheerwine! It's exceptional in a float.
  
  That sounds good!

I don't generally drink soda but when i do, birch beer is my favorite; second favorites are Dr. Pepper, cream soda, and cranberry ginger ale.

They don't exist where I am now, but RC Cola, Dr. Pepper, Kroger Cherry Cola, and European Fanta.

Mr. Pibb baby
But really I drink mostly "Zero" branded stuff. Tastes way better than the diet ones and I don't need the sugar. Coke Zero is way better than Diet Coke. Diet Pepsi is piss, so Pepsi Zero being drinkable is an improvement. I'll say I prefer Diet Dr. Pepper to Dr. Pepper Zero though. And for Mountain Dew neither Zero nor Diet is good.

I had no idea you could make cake with 7-Up! I’ve moved away from soda for the most part, but ice cold Root Beer is still pretty tasty to me in certain situations
- You can make cakes with most sodas!

Guarana Antartica as Energy Drink
Rivella Blue as soft drink.
- Tasted Rivella when in Switzerland really good

I have two. Ginger beer tastes great, and it's helpful if you've got a cold or stomach ache.
It's a 'soft drink' only because it doesn't have alcohol. Manhattan Special Espresso soda. I'd see the old Italian men drinking it when they played bocce. Three bottles have enough caffeine to give you heart palpitations.
https://www.manhattanspecial.com/

I'm sensitive about carbonation so I tend to like the weaker ones. Ramune, Milkis (if it counts), Ski, and Wild Bill's apple soda are my favorites. As far as more common sodas go, I love a diet Dr. Pepper or cream soda.

Store brand cola zero here, it tastes very very close to Coca Cola for about half the price, which I'm very happy with. In restaurants I'm happy enough with Coca Cola, or a Rivella.

Carbonated water + cranberry apple juice mix
Or carbonated water + a little lemon or lime juice

Can't say for sure what my favorite is, but it would be sparkling water or Apfelschorle by volume consumed.

Not mentioning brand name bcus tꝏ localised , but their orange creme soda's ABSOLUTE BEST
Befour that , berry fanta

Lately I've been enjoying a half Mountain Dew half Baja Blast mix when I go to Taco Bell.

I used coca cola as a mild acid and sealant for a rubber barrel on a tumbler. It worked great as an industrial chemical.
All the advertising told my brain it was safe to drink. Yet, I was using it as an industrial chemical due to its high acidic nature. Which caused a heck of a disconnect in my brain.
I decided not to drink the industrial acid. It's a bad idea. They use the extra acid to short your brain wiring, so you can drink something that's too sweet to drink without an acid suppressing the gag reflex. That's why it tastes so bad and sour when watered down.