A sucker for a well-miked and played piano....
Ambiance that almost allows one to walk through it....precisely why I love my Walsh drivers, crude though you may think or consider them to be.
Nailing the balance between mains and subs.
'Tuning the space' for flat...(works for me, yours' will vary...maybe...*G*)
...and Wayyy too many lyrics or snippets of that invoke many moods and responses to categorize...