People are really saying that this 50mm is really for the bokeh. There are only so many lenses out there that can shoot at F/1.2 and this is one of them and the 85mm is the other.
I thought this blog was rad. Dude traveled with his L lenses on a trip and showed what all his shots were with each lens:
http://www.jeaphotography.co.uk/blog/travel-photography-in-sri-lanka
I really wanted an 85mm to force me to shoot differently. I have been in a photo slump as of late. I would go out and literally get nothing good. I really have no excuses too. I have like the best equipment anyone would want, so I really think I just flat out suck....right now hopefully. Since I have the Nifty Fifty, I just feel like this lens won't do anything different, but we'll see. Concert wise, 50mm is an odd range. Not too close but not too far. I would rather shoot super wide or super tight. The middle is kind of worthless imo.