"Taste" can be count or non-count. "She has great taste in fashion!" is non-count. But when my student wrote: "He makes tea which is superb taste." I corrected him "...which HAS A superb taste." Another student asked if "taste" is a count noun and I said that it was. Then he asked if it could be plural and I said no. Can it? I don't think I've ever heard of "tastes".
He gave me a dirty look and said, "It can take a singular but not a plural?" I replied, "Don't shoot the messenger! I didn't create this language, I just teach it1"