BCAA's are essentially bullshit 99% of the time because if you're getting adequate complete high quality proteins from food (including whey or quality plant protein shakes) they contain all the amino acids your body can use.

Honestly, the flavor is all down to the brand. But water just gets boring as shit if you're drinking a lot.

Basically just seconding what Delphia said; if you’re getting adequate protein from food sources than BCAAs are a waste.

I just tend to drink >2L of plain water a day as a baseline, so when it comes to the gym — I’d rather have something with flavour. It’s best to just think of it as gymbro-cordial, with added caffeine on occasion!