I've found that I listen to Beethoven's first three sonatas quite often relative to his others, if for no other reason the themes that are easier to listen to and to identify with. Same thing for his first three symphonies. I think it's characteristic of his "classical" early training and influence of others, particularly Haydn, who apparently was a mentor.
His
late period sonatas are more involved for the ear than his first two period sonatas. I think the late sonatas involve more active listening but bring even more benefit to the listener. He begins to experiment with the sonata form and begins to use fugues in his last sonatas (30-32). Some of these sonatas are quite difficult for the performer (e.g., "Hammerklavier", no. 29, is noted for its difficulty).
I can't overemphasize the importance of the
phase-flattening through the crossover regions to eliminate all-pass phase growth--on the enjoyment of this music. (More background on this
here.)
Chris