Use our acoustic guitar ... as well as blues. Bm7 is just the ticket for a moody minor blues; if you improvise around this chord, try using the D7 shape four frets higher to create a Bm7 and F#7 ...

Whatever style of acoustic guitar you most want to play ... patterns in the acoustic folk examples with other chords, play the blues examples in other keys, try more chords against the ringing ...