Personally I tend to prefer one pieces as I find them to be more comfortable and athletic. I also like collection swimwear from real athletic brands like Nike and Speedo. I like the streamlined look that also offers support and no worries about it popping off of you in an ocean wave. Although that summer I was more often at the pool. I do actually prefer to swim rather than to lounge by the pool, I am usually a vampire that avoids the sun but I like to do gravity immune exercise doing laps in the pool and enjoying the summer weather.
This is a sample of my swimwear collection. The swimsuit above is by Nike and the one below is by Speedo. The gold one below is by Nicole Miller NYC and I love how it has straps that you tie around your body.