Soaring highs- I love treble! But I don't necessarily want highs to completely overpower my music.
Midrange- I want my mid-range to be quite prominent, pronounced but still sounding natural. I want just the right touch of warmth in my music, just to take away the cold and harsh sound lots of treble will sometimes bring. Along with mids, I want tight, quick bass. Not necessarily agressive, but not slow.
Soundstage and presentation I generally go for a more out-of-head kind of experience, I love the feeling of being surrounded by my music. Therefore, I usually go for audio equipment with a large to gargantuan soundstage.