“What strengths do I most admire about my spouse?”
You and your spouse are in this thing called life together. Take stock of what you have there. You married them for very specific reasons. What were they? After you write out the list, might I suggest you write your spouse a note and let them know you haven’t forgotten? How surprised would they be if they read a note from you pointing out their best qualities? You could write one note for each individual strength each day for five days or one note a week for 5 weeks or however you think they would enjoy it the most.