Presumably the answer is generic personal preference, along with the fact that Chuck's personality seemed like he was someone who would become very set in his ways. But he did change some, going from the big p-90 thing to the 355 and variations. But blues based rock n roll with country twang to it, I mean, doesn't that describe music that is ideally suited for a tele? Or, put another way, isn't that what a tele is made for and excels at? And it isn't like he was unaware of them- his friend Muddy Waters used one. I know the general answer is he played what he wanted to play. I do wonder if there was anything more specific. Anyone here use a tele to play chuck berry songs in a band?