I personally find 35mm on full frame to be the most boring focal length. Not really wide, to wide for portraits in my book. And the shallow depth of field look is not that easy to get to unless you go in close - which for people photography is problematic with a wide angle lens (any lens really but let's not get into the physics here).
.....The benefit of the 35 is that you could use it on your 7D as a 50mm substitute which I personally find more useful than real 35mm.
I own both the 35L and the 135L... and will say that blanket statements such as the ones above are rarely accurate.
35mm has its place on full frame...and it is ludicrous to suggest it's primary benefit is as a 50mm on crop bodies!! 35L has been an event and street photography standard for a good reason... it provides that slightly off-keel punch to the shot, includes enough detail when needed in the background that is not totally melted away owing to shallow DOF (you don't always want too shallow a DOF in event photography as you want to convey the existence of the crowd, the movement, and to provide context to the subject). This is not an excercise in how shallow the bokeh can be even though 35L is capable of excellent bokeh.
135L which I recommended also has its place in event photography, though not always associated with events, as it provides distance from the subject(s) not to mention the IQ... which to me includes not only the sharpness but also the compression aspects of the tele.
Look at your shooting style and get lenses that fit your style.