I perceive a phenomenon in the classical music world of a pecking order of importance for different instrumental forces. I understand why assembling large forces like symphony orchestras must be done for the most important works, but the same principle does not apply to chamber music.
Why for example are piano sonatas held almost universally in higher regard than violin sonatas where one more instrument is involved, and violin sonatas are held in ever so slightly higher regard than flute sonatas, etc. But then string quartets are held on almost equal footing with piano sonatas, yet piano trios are slightly less revered, and piano quartets, string quintets etc are all but unknown.
I realize I am making a rash generalization and there are notable exceptions, but I detect this rule of thumb hierarchy even within my own tastes, though I have no idea what causes it. Is this something intrinsic in the nature of the instruments and how they interact?