Favorite EDC/Travel Backpack in each size category

Did something similar with slings but I want to know everyone’s favorite EDC\Travel backpacks in each size category and your explanation/use case. Categories: Small (16-20L), Medium (20-26L), Large (26L+). I’ll go first:

Small: Toshi Pack 20L. Very versatile and I like the ambidextrous pocket

Medium: Don’t have one here but like the Evergoods CPL 24L

Large: Osprey 26+6. Love the ability to expand and I don’t carry a laptop much when I travel so having one big compartment instead of having a separate laptop compartment is very useful for stuffing as much as I can