There is a truth in your words: In my opinion you cannot listen to SET for a long time -- annoying! It's very music specific if you want to listen to voice or some single instrument... Otherwise beefy push-pull will honestly play any kind of music and drive a "heavy" speakers.
I've been unfaithful with an SET amp.
I bought this Chinese SET just for the fun of it,received it put in NOS's and the rest is history. I still like my neutral Joule Electra Stargates, and listen to the Stargates 85% of the time. But the SET has a tug on me the whole time. I take it out and play it when I'm alone or just feeling more emotional, the involvement is simply incredible, hard to walk away from , with of course ,the right music and recordings. A very intoxicating and habit forming experience indeed!