since you asked for suggestions, my suggestion would be...don't tell your audience that you can't explain a certain taste, note etc. when i read that, my first thought was, you don't really know what you're talking about. i respect your beer reviews and hope you don't take this the wrong way, but there has to be a better way to explain a flavor/note than...'i don't know'.
perhaps use expressions or words like...unique, undefinable etc...
keep up the good work billy. if you're going to write, words are your art and your tools. a great professor told me that once.