[amyFB]

I use a capo when I want a particular arrangement of chord voicings that cannot be achieved any other way.

In the key of G, for example, instead of open G, C and D formations, with the capo I can play the I, IV, V chord progressions in other 'forms' but one will sound better than all the others in a given song.

I dislike a capo when it is used to just change key but not chord forms.
the Open forms of G, C and D have the same tone profile no matter where that capo goes, and my ears get bored quickly.

Capo is my last resort; mostly because I don't want to give up real estate on the neck, and I've got a good handle on 3 and 4 note moveable chords that give me lots of flexibility and options.

Idea: play a song you already know well but with a capo and different chord forms, to get a sense of what this can bring to your arrangements. It's not for every song, but when it is right, it sure makes a difference!