Ultimately they would probably correspond to things that you thought of pleasurable, maybe. I mean there are different ways of thinking about them...
either-
(a) pathological- masochistic, the perverse perhaps. or
(b) second or third order pleasures- self-mediated, like reading an extremely difficult book.
However, both can probably be reduced to the same thing, essentially a self-mediated pleasure. But if they result in the same chemical reaction in the brain as a straight-up buzz (orgasm, drug high, the pleasure of laughing at a joke etc) then how are they any different? And, neither of the exampes I give escapes co-option within consumerism. They are merely sold as "elite" products for the cognoscenti, ironically conveying an ever more subtle sense of product-derived identity. Hmm.