Fremont (the area in Seattle where I stay) has a statue of Lenin. The idea being that art should provoke. It may not necessarily be the most positive emotions, but that it evokes emotion is important.
"My paintings are not pretty, they're evocative." says an artist (in some random film I saw a while back on STAR Movies)
Dislike is acceptable. However, the best art, music or film shouldn't leave you indifferent.
I remember the first reactions when 'Kill Bill: Vol 1" was released. There were friends who loved it and friends who disliked it. However, QT, I'm sure would be most crushed by a comment I heard.
"I don't know what the big deal is."