I'd prefer another little for a partner. Someone who wants the same normal adult things in life I do and who is also into this privately so neither of us have to hide or dread revealing anything or risk acceptance conflicts. They would also need to feel the same about not desiring a cg dynamic.
I'm fortunate enough to enjoy the little lifestyle without needing or wanting a mommy. And it never works with a vanilla because the mismatch in sexuality (ace + normie never works out).
Just a otherwise normal couple on the outside with careers, kids, house, all that "normal stuff", but neither of us place value on traditional sex and hormonal attractions or romancing. Just two kids ourselves trapped in adult bodies who would rather goof off and enjoy kid things together. We can be content and happy wearing cute things and building blanket forts and playing video games and collecting stuffies and legos and snuggling on the couch watching cartoons. Both of us being older independent Littles who don't need or want a cg relationship but just want someone to share our lives and achieve common goals with where we can be ourselves without hiding. Wear diapers and footie PJs whenever we feel like it no strings attached. That would be my ideal match.