I would guess both power and the human factors cited above are likely culprits.
It could also be you just don't like your present system. I've had similar feelings about systems over the years, I'm finally at the point where I like my system all the time. While I may not enjoy it to the same level at each listening session, I never end my sessions feeling something is fundamentally wrong with the system, now chalk it up solely to mood/disposition variables.
It could also be you just don't like your present system. I've had similar feelings about systems over the years, I'm finally at the point where I like my system all the time. While I may not enjoy it to the same level at each listening session, I never end my sessions feeling something is fundamentally wrong with the system, now chalk it up solely to mood/disposition variables.