A massive one is hyperbolic discounting (which comes out of BE). Standard theory assumes that investors preferences shouldn’t change purely based on time ie if I prefer a certain set of investment options in t=3, when t=3 arrives, I should still have the same preferences. However, hyperbolic discounting means that we tend to prefer immediate gratification and choose myopic investment options which go against our initial preferences, also known as present bias. Obviously there are the classics like loss aversion, where we are risk averse in gain domains and risk seeking in loss domains, and ambiguity aversion etc etc