I enjoy listening to analog repeater conversations it helps me feel so much better about myself.

HAM Digital Voice Standards comparing the major digital voice

Digital Voice Standards - MicroHAMS Digital Conference 2015

John Hays from Northwest Digital Radio, does a great job of comparing the major digital voice options we have for Amateur Radio. He covers D-Star, DMR, System Fusion from Yaesu and the only Open Source option: FreeDV.