My favorite - and only - Lumix Leica DG lens: Nocticron 42.5/1.2 :thumbs:
My favorite Oly lenses: 7-14/2.8, 12-40/2.8, 40-150/2.8, 300/4, MC-14 :thumbs: and the 75-300/4.8-6.7 II
My favorite lenses for MFT :
Olympus 12-40mm F2.8, Olympus 75mm F1.8
Panasonic 25mm F1.4, Panasonic 20mm F1.7
I like the results of the 40-150mm F2.8, but can't put it among the favorite as it is too big and too cumbersome.
Other lenses I like less :
Olympus 12mm F2 (the pro zoom is just as sharp), Olympus 45mm F2.8 (my copy is decentered)
Panasonic 7-14mm F4 (it can exhibit purple blobs on Sony sensors) Panasonic 14mm F2.4 Pancake (I like the size but it has too much distorsion)
Samyang 8mm F3.5 fisheye (difficult to focus correctly or I have got a bad copy).
Lenses I don't care for :
Olympus 12-50mm zoom and the slower 40-150mm (it is light and very nice to handle but once you have seen the results if the pro version you don't want to shoot with it anymore).