Their taste is definitely odd. It’s sweet but not really, and often leaves a soapy aftertaste. The only way I can deal with it personally is if the food in question is flavorful enough to drown out the strangeness, in which case it probably didn’t need sweetening much anyway.

You get used to it after a while. I actually sometimes prefer a Coke Zero because of its unique taste (though I try to avoid soda altogether.)

They taste different to cane sugar / corn syrup but good/bad is subjective and something you get used to. I used to not like it but now my taste adjusted it and now I don't like the "real sugar" flavor.

I agree, but maybe that’s because it gives me a headache.

At least, I think it does. I can never remember which sweeteners do - some do, some don’t. I don’t eat them enough to keep track.

It's a big category. Aspartame has a really distinctive taste, but lots of sweeteners like sucralose and allulose not so much.

I can recommend tagatose.[1]

It tastes and feels indistinguishable from ordinary table sugar to me.

[1] - https://www.wired.com/2003/11/newsugar/

[2] - https://en.wikipedia.org/wiki/Tagatose