Singles and Couples - 85 1.2
Small groups, basic details, etc - 50 1.2
On the 5D, the 50 1.2 doesn't work well for single subject close up shots. I understand the "wanting to be close to your subject" thing, but that focal length on a full frame camera will give your subject the "alien head" look. 85mm is a comfortable distance for me.
Oh, and the 70-200L is great for the unobtrusive photographer "couple walking together hand in hand" type shots.
And yes, I've used way too many quotes in this response.