I love Tarrega's etude in E minor! For years when I would play publicly anywhere this would be the very 1st thing that I would play as a way of warming up before either introducing myself or getting into the repertoire. I have since shifted it to a different position in my playing order but I really love the expression that can be brought forth in this work.
It demonstrates that even the relatively "simple" pieces of the guitar repertoire can be very beautiful and expressive. They are also worthy of being shared with audiences.
Admira Virtuoso (c. 1999).