Complex sentence: He is arrogant and self-centered, focusing almost solely on his own pleasures, although he proudly lives up to the letter of his promises-but always no more or no less than what he promised.
Split into simpler sentences: He is arrogant and self-centered, focusing almost solely on his own pleasures. Although, he proudly lives up to the letter of his promises, but always no more or no less than what he promised.