Vibrato helps fretted notes sustain longer and gives them more presence. Why should the technique be reserved for the violin or cello? It's a great technique for the guitarist to add a bit of sparkle to the music.
Over the years I've developed techniques and picked up some gems from influential teachers such as Craig Ogden, Manus Noble and Gary Ryan that can make playing so much more pleasurable, snippets that can help make the seemingly unachievable, achievable.
My general approach to good technique is one based on relaxed posture and focused effort. The reason we work on technique is to allow the music to be freed from the score and expressed by the guitarist with ease and confidence.
Lots of students have asked if I could record the exercises we regularly use and this blog is the result.