Cilantro really tastes different from one person to another (relative to the aldéhyde content of cilantro and genetic variations). I don't know about sugar and aspartame but saying that it is purely a "preference" looks a little bit presomptuous to me.

To the previous poster: do other intense sweeteners (stevia, saccharin, sucralose) taste sweet to you?

None of them do with the exception of Stevia, which sort-of kind-of tastes a bit like rum, if I could describe it.