This is a very minor / low priority UI suggestion.
I never share stories via email, so it would be nice to be able to just disable that sharing service the same way you can disable Twitter, Facebook, Readability, etc. It would be nice to just have a big fat button for the one service I actually do use, rather than a small one off to the side of the one I don’t use.
It’s definitely not a huge deal, but email just strikes me as something that should be treated the same way as the rest of the sharing services.