I’ll be the odd ball out it seems! I tried a bunch of electrolyte powders last year and can’t stand Liquid IV or Nuun. In any flavor or any temperature.
I do agree that many “off the shelf” sports drinks are more sugar than actual electrolytes. I took to comparing the GAs to see what was actually in each mix/ drink. The best I’ve found for me is GatorLytes made by Gatorade. I can’t stand regular Gatorade - too sweet and makes my stomach hurt like other posters. The GatorLytes is much lower sugar (9g total I believe?) and packed with electrolytes. Between this year and last, Gatorlytes has either prevented or pulled me out of a heat stroke episode countless times (I’m in the Midwest with heat and humidity).
I wanted to add that hydrating with plan water is important too but you can overdo it and pull even more electrolytes from your system. This is an individual thing as it depends on what your diet is like (lots of salty foods or already supplementing electrolytes in another form, highly active vs moderate, and personal tolerance levels). For me, it took a bit of trial and error but now I can usually tell (based on how I feel) when I need electrolytes vs plain water.