I think my Id would mostly be socially inept characters that are somewhat emotionally repressed/blank, and also self-sacrifice and dysfunctional relationships push my buttons like whoa.

People who get physically close, but they never actually start to have sex. If it's aggressive, or if one person is the one that initiates the contact and doesn't really acknowledge personal boundaries and the other one just tolerates it like it's no big deal. Both work :D