Of all the…
Definition 1 of 2
Pro Tip 1/3Preference Highlight
Use 'of all the' to indicate a favorite or best choice within a group. 
Of all the books in the store, this one captured my heart.
Pro Tip 2/3Surprise Element
Shows surprise by highlighting an unlikely choice or occurrence from a group. 
Of all the restaurants we tried, that tiny place had the best food!
Pro Tip 3/3Comparative Emphasis
Emphasizes a significant difference when comparing items or experiences. 
Of all the cities I've visited, Rome had the most charm.