Overall Disco Volante is my favorite beginning to end album of theirs, but California has some of their best songs. For the shows they were doing this year they were playing The Raging Wrath of the Easter Bunny in pretty much its entirety.
Side note, but of the non-Patton side-projects I'm also a big fan of Secret Chiefs 3 (Trey Spruance and a large rotating group of members) and have seen a number of their shows over the years. Their live performance of Exodus is always a highlight.
Apocalyptica has been doing quite a few "stay at home" concerts. Anyway if you were somehow living under a rock and never had a chance to listen to these guys (like I was until three years ago), you need to check them out. Astonishing what they do with Cello's and a drum set. The depth of music is amazing IMHO and the sound completely unique.
Every now and again I stumble across a little gem on the customs forge. Straight out of 70s sludge, it's Dopelord with The Witching Hour Bell. Just some nice heavy molasses with a big slice of Ozz-like vox.