All of the above:
Bikini/posing suit reveals as much of her physique as possible while still clothed, and shows you what she presents onstage.
Normal clothes are great because you see what she'd be like on a usual day, in the wild. Leah Dennie is great for posting her work outfits: tight fitting business attire that's professional but you still know she's got a mindblowing body.
Fully naked? What else is there to say about that?