2 years ago I learned to play midnight by Satriani. Recently I learned Day's at the Beach by Satriani.
Can't play either fully now.
I notice everyone thinks that the best thing they play is necessarily the hardest or the thing they can do that the fewest other people can. If I had to pick something rare from my playing it might be my abillity to violin pinch harmonics or the arpeggios I can play using only my 'picking' hand and tapping.
The Best thing I can play? ?? !!! The fool!