There is no music I really hate - those I hate I won't consider music. I cast them aside as noise, such as rock'n-roll and similar discotheque noise, predominant dissonance, rubber erasers and bolts and nuts on piano strings (John Cage's "Prepared Piano"!), squealing, screaming . . . and the list goes on and on.
There are much music that I simply dislike (or feel indifferent towards, ie, zero or neutral feeling) but not as negative as hate. Most - and I emphasise "most" - works of the supremely prolific composers, such as most of the sonatas by Schubert (except the last one in Bb, D.960), Mozart and Haydn, most of Mozart's concertos (but I definitely love his Piano Concertos 20, 21, 23, 24 and the Sinfonia Concertante in Eb). In fact I am generally indifferent towards music from the Classical Period. I like the Baroque Period more.
Ravel wrote 2 wonderful concertos for the piano and I love them both, except one place in his G major Concerto (for both hands), and that is a middle section of the slow movement where the melody is accompanied by another melody in a lower register that is in a different key. Good grief, that little section sure sounds spooky, somewhat sick. It leaves the listener in discomfort.
There are pianists, however, that I consistently dislike. I simply do not want to get in tune with their styles because hardly, if ever, could I perceive music from them, albeit the technical prowess that they all doubtlessly possess. The list is topped by Vladimir Horowitz, followed closely by Alexis Weissenberg (I've heard his live recital in Hong Kong), Andrei Gavrilov, Alexei Sultanov (also live recital in Hong Kong), Ivo Pogorelich (again live recital in Hong Kong), Martha Argerich, John Ogdon, and Vladimir Ashkenazy is on the borderline . . . I know that many of a someone here is bound to disagree, but sorry this is just my opinion.
DIGRESSION:
Calm down, my friends. This is a forum, a place to express and share opinions. As a poster everyone is entitled to freely express his/her opinion here. As an audience it would be nice if everyone respects other people's opinions, whether they are in tune with his/her own tastes. So I urge you all, please put an end to flamings.