I find trance best listened to in a dark room so that one can be enveloped by the music and its subtle developments...
Interesting.
You see, this is where I cannot agree with Stephen, as lamentable as I find the experience of having to 'get up and dance'. Not all modern music is dance music. Personally, I find trance and other sorts of electronic music difficult to get my head around, but I do adore a wide range of metal, rock and indie, and a selection from the jazz, blues and boogie-woogie (which are perhaps less modern, but did fall prey to dear Stephen's 'allergy'), and
I have never willingly danced to any of them.
In fact, whether listening to Jools Holland, Nightwish, Led Zeppelin, The Killers, Elton John or things from the more classical end of the spectrum(which is a really insufficient, crappy overview of my musical tastes

) I generally find the best way to enjoy the music is either alone in a darkened room, or alone and walking the streets (possibly in a crowd) with the old iPod turned up full blast and whatever song it happens to be becoming the soundtrack to that moment in my life.

Cheesy, I know. But it works.
A lot of current popular music may be
designed for bopping and gyrating, but this isn't compulsory. There is as much of a line to follow, as much tension-and-release and as much emotional variance in Bat out of Hell or Bumble Boogie as there is in Beethoven's Fifth or any Bach Chorale.
But then music is, as you so rightly say, very personal. So feel free to ignore my little rant.