Remember, that of all the elements that comprise a human being, the most important, the most essential, the one that will sustain, transcend, overcome and vanquish obstacles is - Spirit!
Anger is a manifestation of a deeper issue... and that, for me, is based on insecurity, self-esteem and loneliness.
I do very few standards. Hardly any. Other people's tunes that I do are usually obscure tunes, for the most part, although I do a couple of Duke Ellington tunes that are well known.