creature of habit
One who prefers the comfort and reliability of routine and habitual behavior. My brother is far too much a creature of habit to be up for something like backpacking across Europe. I know we're told to shuck our routines and live spontaneously, but I'm a creature of habit—it's just easier when you know exactly how each day will pan out.
creature of habit
a person who follows an unvarying routine.a creature of ˈhabit
a person who always does certain things at certain times: My grandfather is a real creature of habit — he likes his meals at the same time every day.