I've been taking guitar lessons off my same teacher for nearly 2 years now and have progressed from hardly being able to play "Smells like teen spirit" to looking at playing Buckethead, Satriani, writing my own weird stuff, playing claypool/wooten-style-bass and studying baroque music. He really has been a great help, but in recent lessons he's been getting me to do really easy stuff like learn this easy song, or sight read this simple piece. I just don't feel I'm learning that much anymore and I wouldn't miss anything by not going. I did however get a keyboard for christmas and I would like to get good at that too, and I can only do guitar lessons OR keyboard. Does anyone have any experience from leaving their teachers and would give any advice on what to do?