Well, I shot a bunch with the Leitz Elmarit-M 28 2.8, and have come to the conclusion that the coolest thing about that piece is how it looked on the camera!
It was fun to focus and shoot with but... the images, all RAW, seemed to have no pop, micro-contrast and were just plain not doing it for me, they seemed to all need doctoring up in LR. So I picked up the Sony/Zeiss 24 1.8 which I had for a short time previously, It's exactly what I was looking for, images (RAW) are great right out of the gate. Additionally I acquired a Voigtlander 15mm 4.5 wide angle lens which is great fun!