The 50 f/1.4 is not perfect but this is a very good lens on FF (although a bit soft wide open).
I thought my 50/1.4 was soft wide open until I deliberately and consistently increased my shutter speed, and it "sharpened up" considerably. The DOF at 1.4 is so thin that it is easy for your subject to move out of the zone of focus a little, or a slight camera movement to have the same effect. Faster shutter speed is not a complete solution, but it definitely seemed to help.
I recently rented the 35 f/2 IS to see what all the excitement was about. Then I bought it. Have not used the 50 f/1.4 since. That was my point above. Nothing against either of the 50 mm lenses. They are both great.
I also sold my 50 after getting the 35 f2 IS, after it sat unused for nearly 6 months.


Though I'm leaning more and more towards the Samyang 24mm now 

