What builds trust fastest in a client gallery?

I’m building BoxGalleria for businesses that depend on visual proof of work, like interior designers, remodelers, junk removal experts, cleaners, landscapers, salons, gyms, and other transformation-focused brands.

One thing I’d love feedback on is this: when a potential client opens a gallery, what builds trust first? Is it strong before-and-after presentation, clean branding, video, testimonials, pricing clarity, or an easy way to make an inquiry?

I’d really appreciate honest insights from founders, freelancers, agencies, and business owners. What would make a gallery feel truly professional and client-ready to you?