Congratulations! you have a very sustainability motivator as your favorite singer. Jack Black has worked on the documentary Living Dangerously which is a wake up call for all of us 
I feel he was his true best when he was in School of Rock where he stole his friends identity and became the substitute for music class.
You are more than right amazing times not like now that Tenacious D tour was canceled 
I had a chance to see him last year but then it got cancelled anyway. My two favorite songs by him is Wonderboy and Tribute. I even started learning wonderboy because I like the strumming on guitar
Tribute was his first single it was released 2001 Jack refers to it as the Best Song in the World 
Ha ha yes. Great song! There was The Pick of Destiny movie that came out in 2006 but never watched it also.
ha ha JB left his religious family headed to Hollywood where he met acoustic guitarist KG, maybe that's why he and you like strumming on guitars that sounds fun 
He had a couple good movies also like Shallow Hal and Nacho Libre was slightly funny being a masked wrestler. It got almost a zero percent on Rotten Tomatoes!
Maybe because there is a lot of street fight and because it was not produced by the big Hollywood film makers but for me if JB is involved I'm in 
One thing I found is he did a documentary where he went over to see how bad 3rd world nations were and followed a young boy. You could see his compassion for this young boy who wanted Jack to take him back to the US
You are absolutely right he is an advocate for social justice, he cares about people he cares about climate change he is an amazing human being besides being so talented