"life stage": stage of one's life (infanthood, youth, etc.)

to differ / to vary / to disagree

stage, a place for performance / performance on stage / (video games) stage, level

experience (an experience or one's (overall) experience)

to experience

(video games, games) life

(chiefly women's speech) first person singular pronoun: I, me

easy-going life / lifestyle

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness