Lee_M. said:
Haynes and Derek are two of the most humble people in the industry. Neither have attitudes and both love to play guitar. To me, Haynes has so much positive energy about his playing that it really engulfs you as a listener and audience member. Derek is very mesmorizing (sp?), too. He doesn't make any facial expressions and plays slide like a madman. As Lew said, he definitely has a laid back and joyful feel to him.
I've really enjoyed Warren with the ABB over the last 15 years - what I've come to discover, though, is that his magic is really with Gov't Mule. I saw a lot of their shows when they were coming up through the mid-90's. They were nothing short of phenomenal. That's not to say that he doesn't sound great with the ABB, but his true creative spirit shines through with the Mule.
As for Derek, I love listening to his own band when they do tunes like "Kickin' Back". They are creative Samba-like songs that have great energy. Great guitar tone, too.
I could really go on for days about all this, so I'll stop and let someone else have a go at it!