In a documentary I remember or seem to remember, Nabokov is asked about his likes and dislikes; he conveniently has his notebook nearby, and turns to a page with the appropriate lists...I haven't been able to find this amusing episode in Strong Opinions—did I imagine the whole thing? The one dislike I recall was "music" (or perhaps something more specific: "elevator music," "jazz"). Here's a list of dislikes (or indifferences) from the intro to Bend Sinister (the 1963 Time-Life books edition):
I have never been interested in what is called the literature of social comment (in journalistic and commercial parlance: 'great books'). I am not 'sincere', I am not 'provocative', I am not 'satirical.' I am neither a didacticist nor an allegorizer. Politics and economics, atomic bombs, primitive and abstract art forms, the entire Orient, symptoms of 'thaw' in Soviet Russia, the Future of Mankind, and so on, leave me supremely indifferent.
In Strong Opinions, we find:
Still there must be things that move you—likes and dislikes.
My loathings are simple: stupidity, oppression, crime, cruelty, soft music [!]. My pleasures are the most intense known to man: writing and butterfly hunting.
There are also numerous instances where he lists authors he likes and dislikes, which I'll spare you for the moment...