I'm a cold analytical techie, except when it comes to music. When I feel like expressing emotion, I play music. Sometimes on the record player, some times listening to the radio where pieces surprise me, sometimes when I play the piano or organ.
Practicing of course is very analytical in the beginning, but the first time you play some pieces with hands together, is fun. Then when you get them up to speed, even more fun. Then after long practice I do little volume, accent, and (rarely) speed tricks to make a piece even more interesting.
I play a lot of flash pieces, since I like that sort of thing. Lecuona Maleguena I learned when I was 11. Baby Elephant Walk and Dance of the Sugar Plum Fairies on organ are my latest flashy pieces. I play some pieces to get angry - Moonlight Sonata Mvt 3 is perfect for feeling as neglected as smelly old Beethoven. Some pieces are for feeling sad or lonely - some winter pieces, R. Dwight Funeral for a Friend Candle in the Wind or Blue Lagoon, Abilene. Pictures at an Exhibition has two haughty processions of nobles, two flippy children's larks, two travelogs in the Russian vast emptiness, two crashing tantrums, a big broad Busby Berkely show to finish. Count on Him is dismissive or wry, as I found the real Count Basie to be.
Recently I've gotten into nostalgia, where I play six of the hundreds of old hymns I sang as a child in the South, in a little country church on Sunday AM. I've found a group of old people out there that love to sing hymns to live piano, and aren't afraid of something different every Sunday. They are a great handful of people, with a rare spirit these days.