Embrace the vintage trend and use it to accentuate rather than try and hide your curves. Try halternecks or cupped styles, and anything that brings in the waist to play to an hourglass shape.
Pear shape / small bust
Use ruffles to your advantage by adding volume at the top half. Ruffles around the bust can make it seem visually larger. You can also use vintage cupped styles with padding to create curves.
Use ruffles to your advantage by conversely adding them to the bottom to balance your hips with your bust. Avoid unstructured crochets or string bikinis if they don't offer any support; instead stick to strucutred styles and halternecks.
To lengthen the body pair a printed bikini top with a block-coloured bottom, drawing the attention upwards. Avoid boy-legs and go for high cut thighs instead so as to not shorten the legs further.
If you're not big on the curves make the most of styles like statement strapping, backless styles and crochet that instead show off a toned physique.