O'Halloran is a bit like Glass on piano, I'm afraid: initially one is overwhelmed by the simple beauty, but over time it wears thin simply because there is not much substance to it. It is not like, say, Satie - also beautifully simple but melodically bold and original. Try Faure. Chopin. Prokofiev. Debussy. etc. etc. etc. etc. etc. etc. A reasonable segue for the pop-inclined ear into a richer musical world.