I find idols very useful in learning. Idols keep you humble. There will always be someone who knows or have tried more and tells it or does it better. One my current idols in the software world is Martin Fowler. He wrote the defining book on refactoring that I'm currently reading (again) and two books on patterns that I'm very much looking forward to read.
Now he has been extensively grilled on his views on extreme programming, refactoring, design principles, and more in a four-pieced interview (1, 2, 3, 4) that has two more installments coming shortly. He's even more of an idol now.