I've tried a ton of social plugins.
All of them either slowed down my site a lot, were ugly, or functioned poorly.
After trying so many, this is the one I'm sticking with.
Some suggestions for future improvements:
- make icons svg so icons are resolution independent and don't require extra images to load (more http requests) something along the lines of the stuff happening here: http://www.evan-herman.com/wp-svg-icons/
- option for a vertical floating bar