It's possible our taste in what we like to hear changes with time too. Less detail and more musical midrange with full body sound is what I prefer too. While I'm not a Parasound or Macintosh owner both offer great options. Good source and proper speaker matching can make a huge difference in preference one way or the other.
It does not appear the OPs original post was really an apples-to-apples comparison anyhow jumping from one store to another with completely different setups over an extended period of time. I've heard some crappy Mc systems and some really good ones all dependent on the room, component, and speakers chosen by the person giving the demo. Same setup can sound completely different when you get it home for demo too. Lots of variables.
It does not appear the OPs original post was really an apples-to-apples comparison anyhow jumping from one store to another with completely different setups over an extended period of time. I've heard some crappy Mc systems and some really good ones all dependent on the room, component, and speakers chosen by the person giving the demo. Same setup can sound completely different when you get it home for demo too. Lots of variables.