Right now I have only been playing for three years, and currently I am not taking lessons, but when I take lessons, my skills and learning reach new levels. Not only will a good teacher teach you all that good theory ( like what chords you can play a dorian scale in C over) but he will also teach you some fun songs that can impress your freinds. While im writing this, I would like to say, listen to Acoustic-guitar. He knows what hes talking about, and he plays the hardest type of guitar out there.
Peace out, play on.