I used to have my 50 1.4 as my standard lens, which was really frustrating because it wasn't acting as a 50mm on my 20D. In other means, it didn't serve me well for walkaround (though it did for portraits).
I was always willing to get a 28-35mm lens as a standard lens. Was about to purchase the 28 1.8 but then thought it's a bit wide plus I don't want to downgrade to 1.8. Anyway, I pulled the trigger and bought the 35 1.4 after months of saving and research.
My first impression was "what i was doing without this lens before". Now I feel that I got the classic 50mm with 1.4, awesome. Never used to walk around with my 50 1.4 because it was simply very tight. After getting the 35 1.4 i got to the habit of moving around with my camera.
It's not only about the focal length but even sharpness wide open. I thought that my 50 1.4 was sharp wide open, but with the 35 1.4 I knew what sharpness means!
The downside of this lens is the distortion when coming closer (when photographing people). Which in fact is the problem of my 20D, because this lens is a full-frame wide angle.
Whenever i'm not photographing people, I can go closer and get the premium bokeh quality of this lens. Can't wait to get a FF!
PS: I dont remember sticking my 50 1.4 in front my camera after getting the 35 1.4. I gave the 50 1.4 along with my film body to a friend. I am saying this to stress how much did the 35 1.4 made the change in my photograhic life + lifestyle (yah lifestyle because Ls really look good specially when walking around with them!)