Plyo-X is the only routine I actually wear shoes while doing. Even then, I've done it without with no issues. I typically use an exercise mat, so I don't really feel the need for shoes.
In other news... Why the heck is Whey Protein Powder causing me to get Diarrhea?
I'm perfectly fine with milk. It's god damn annoying. It doesn't hurt, but I have to hold my farts in.
*awaits avatar quote