I composed some triad studies in different keys and wanted to share one with you here.
It's in the style of a Siciliana, which was popular in the Baroque period and usually features a lilting dotted rhythmic figure.
Triads give you a great basis for composing with, as it's quite easy to create a full texture, including melody and accompaniment. Triads also allow you to traverse the fretboard much more freely than your standard guitar chords.
In the example, brackets indicate triads (which are often arpeggiated out) and the Roman numerals indicate the position to play the triad in. There are no fingerings because these chord shapes are so directly related to the triad exercises of the key (C Major in this case) - you'd get your fingerings from those exercises.
Thinking this way can really help your sight reading, as you start to group notes into larger units. Guitar music is founded on chords (said Aguado!), so this process of grouping notes and seeing triads in pieces will serve you very well for sight reading, learning pieces, understanding, interpreting, composing and improvising. Why wouldn't you want to learn triads?!