Well, As long as a person can teach me techniques and he could personally play well.I do not care about his/her credentials.Besides,playing guitar cannot be taught.It can only be practiced. Only the technique can be taught but other than that its sheer practice.
That's the simple way of looking at it. What makes a good instructor great, is something that goes deeper. Any clown can teach you how to pick a note or strum a chord. A great instructor will teach you what to do with that note, and how to make it sing.
Learning the guitar is about practice. But developing yourself as a musician, on the other hand, is entirely different. Classical pianists that are good enough to enter the Royal Music College in London are beyond grade 8.
They are not only taught how to read and play a demanding classical piece, they are also taught and guided on how to interpret the music, and how to bring out the best of the music using THEIR unique talents. That's why there is a huge difference from a Julliard graduated concert pianist, and a Yamaha Grade 8 student.
That is something 99% of guitar instructors in Singapore lack.
I played with a guitarist once. Completely technical. fine. totally accurate. fine. But lacking in character. Asking him to bend a note sounded like just a simple bend. No story was told in that one bend. Nothing engaging. Completely boring. He had abolutely no clue what he was doing, or rather, WHY he was doing what he was doing. Just running licks mindlessly. No structure, no character, no form.
Yet he also teaches students. I shudder to think of what they might end up becoming when they learn from him. People who don't even know what they're doing shouldnot be teaching. And no, being able to play well is not an indication.
I'm not even talking about "feel" here. I'm talking about application. Knowing what to do, when to do it, and how to do it best. You want to bend? Fine. What do you want your bend to say? What do you want your audience to envision when they hear that bend? Apprehension? Anticipation? Relaxed? What? THINK about what you want to play before you play it. You will make a lot of sense. Same applies to talking. What that guy was playing? Was garbage.
That was taught to me by a GREAT instructor a long time back. Made me rethink what I was doing. A great instructor is able to help you with your mistakes. He can tell what you're doing wrong just by looking and guide you to ensure you don't pick up bad habits. he can explain to you WHY you sholdn't be doing what you're doing.
Remember, guys, it's easy to wow a noob or a casual listener. It's a lot harder to impress and experienced listener/guitarist.
Ever wondered why I've been playing for 20 years yet I refused to accept students? (yes, I've been asked from time to time) I only agree to give pointers. Not teach per se. I cannot teach what I do not know. And I don't know A LOT.