I debated that - I almost got a larger pull for the 21 inch drawers but in the end, I got 96mm pulls for all. I decided to just get a "standard" size for all so that I can easily change them out later if I want. For the Dishwasher panel though, I got a large pull (I can't remember now but I think it's about 8 inches.) There are also 3" pulls but they were too small in the hand.

I thought I'd get pulls for everything but after the cabinets were up and I tried things out, I went with knobs on the top, with the holes spaced so that I can later change them to pulls.

I used standard 3'' bin pulls on all of my drawers. Same size, but the large drawers (like for pots) have two (for 2-handed pulling) and the small (regular size) drawers have one pull in the middle.

I also used single bin pulls on my paneled dishwasher, trash pull-out and spice pull-out. The actual dimension of the pulls is about 5'' wide and they feel plenty hefty for those things.

Bottom cabinet doors (not many...mostly drawers) have knobs and all upper cabinets have knobs.

I have one large handle on my paneled refrigerator door and one small handle on a paneled bar fridge door.

My knobs/pulls are solid brass in a Barcelona finish from Creations by Alno.

I'll be starting in about a week and nothing is here yet. I don't know what I'll use in the end. What I chose to do was order some extra so I can experiment with different combinations and orientations when everything is here and the new kitchen is starting to take shape.

The thing about mixing is making rules so that it makes visual sense. It doesn't matter what the rules are, just have them.

Examples:

Knobs on doors, pulls on drawers.

Knobs on glass fronts, pulls everywhere else.

Knobs on full height cabinets (pantry, hutch), pulls everywhere else.

Pulls down, knobs up.

GC started drilling holes on uppers and I haven't even chosen knobs yet! I ok'd the decision. I guess I'm committed to knobs.