Well, I could be wrong, but I don`t think you`ll find anyone who really dislikes Haydn`s music in particular. He may not be as popular as Mozart and Beethoven, but he remains one of the very best composers from the classical period.
Haydn`s music is still performed fairly often; things like his Oxford, London, Clock, Matin, Midi, Soir and Surprise (wake up!) symphonies are well-known and liked. His string quartets also; the Lark, the Emperor...
Maybe I could generalize and say that his works (with exceptions of course) tend to be of a somewhat lighter and less dramatic nature than Mozart`s or Beethoven`s? Most probably lighter than Beethoven`s at least. Maybe Haydn`s works have less of an 'effect' for that reason.
I would say that I like more works by Mozart and Beethoven respectively than works by Haydn. Having said that, I admit I haven`t listened to all works by these three composers. But from what I`ve heard, I would say, imo, that Mozart and Beethoven wrote better works than Haydn. There, I said it. :grin:
That doesn`t mean, however, that Haydn`s works are not of excellent quality; they certainly are.
Also, not sure about comparing Beethoven to Haydn; they weren`t really from the same period. Then again, Mozart and Beethoven tend to overshadow many, many other composers from all periods, not just Haydn...
It`s not really fair to compare one composer to another though... the only comparing I tend to do is by going work to work, deciding which works I like best. But that`s only for personal preferences...