who do you need? / which are you?
someone who understands you/the other completely, inside out, pre-empts you/him/her, knows your/his/her motivations and intentions, your/his/her sensitivities, proclivities, demons
or
someone who doesn't quite meet you/him/her on a similar wavelength, but is a safe, warm haven from your/ him/herself and all the things that you/he/she hate(s) about your/him/herself
ceteris paribus of course, holding love constant most of all.