You could have lost vision, or passion, or creativity, or motivation, or soul, or similar thesaurus words for these spheres of Humanity.
Realms of possibility range from personality type, depression, burn out, or simple disinterest as you age. You might know best or at least better than I/we here on HN for obvious reasons.
Granted that not all art is for all people. Many museums, I can be in-and-out in 90 minutes feeling satisfied and that includes the bathroom and gift shop ... and if I go with anybody I either have to loiter or leave and come back to pick them up. Other museums though it is the reverse. Could be that for you as well.
