I'm still building my toolkit out, but I found a socket set that checked all the boxes that I think is worth sharing (there are so many, and they are missing something, or have things you don't need). Quality manufacturer, mid-range price, metric only, 6mm-24mm standard and deep, with ratchet, extensions, and u-joint.
3/8 Inch Drive 6-Point Socket and Ratchet Set (42-Piece) | TEKTON | SKT15201
I ordered the 35mm deep socket, 5/8" spark plug socket, and 3/8"x1/2" adapter while I was at it.
