“You come heah wid yo’ mouf full uh foolishness on uh busy day. Heah you got uh prop tuh lean on all yo’ bawn days, and big protection, and everybody got tuh tip dey hat tuh you and call you Mis’ Killicks, and you come worryin’ me ’bout love.” “But Nanny, Ah wants to want him sometimes. Ah don’t want him to do all de wantin’.”
Notice the contrasting views of Nanny and Janie.
Nanny has had a rougher early life compared with Janie, being a former slave, and as a result, she doesn't even care about love. Having someone like Logan as a husband would be unimaginably good to Nanny when she was Janie's age.
Janie never faced slavery, and takes personal safety for granted, so she wants personal fulfillment as well.