Cospuri review
Cospuri organizes its cosplay catalog around scenes and performers. I'd pick the scene shelf if a costume or setup caught my attention, and the model index if I wanted to see what else a particular performer appears in.
Browse by the part that caught your eye
Cospuri's public samples have theme tags such as Cat Ears, and its model index gives each performer a route into their own listings. A tag helps when I remember the look of a scene. A performer page helps when I want to see how the same person appears across different themes. Czech Casting is a comparison if I'd rather follow a series built around a recurring casting format.
Use the public tour to make a shortlist
I’d use the samples to see whether a theme has enough variety to keep me browsing. A few familiar costume ideas across different performers would give me a clearer picture of the site’s style than the most popular scene on its own.
Anabel’s take
I'd choose a costume theme first and see whether the samples led me to a performer I wanted to follow. That would give me a better reason to come back than simply seeing how many scenes are on the front page.