Actually there is no genre of music that i do not like categorically
although there are individual songs in every category which i don't
particularly care for.
guess the best description for me is "i know it when i hear it"
pretty much the same - people wh oare truly musical and really genuinely love music can find something positive from nearly all genres - even if a genre is not their favorite or they don't like a certain style or song within a genre
for example I love C&W but not a big fan of the old school crooners - their monotone bores me but I love bluegrass and fusion (new country)
and I love metal but do not like thrash death and have a very limited tolerance for speed - I like mudvayne ozzy & deftones
Oh and primus is not jazz and I prefer the real originals RHCP
so ya see it's all good