I like Dr. Pepper Zero (it's much tastier than the original Diet DP, and comes in four flavors), and the Caffeine Free Coke Zero is, so far, the tastiest Coke. I'm not a huge fan of Coke (for a small number of years pre-Covid they had Splenda Coke, and that was tastier than aspartame coke. But it seems to have disappeared completely along with many varieties of things that didn't survive those years).
I liked the diet Pepsi products better for the couple of years where they had swapped from aspartame to Splenda, but apparently those didn't sell as well because they went back a few years ago. The mango and cherry diet flavors are still pretty good, though not my favorites.
Most of what I drink though is tea. lol