My answer: Best / Male: Sunglasses, Short/Long sleeved Rash Guard with Swim trunks/Board shorts (with/without tie), and water shoes (optional) | Reason: I hate sunscreens, and I think Rash guards will be an alternative to sunscreen. I may prefer long sleeved ones in the future. I also would like sunglasses to come with swimsuit. || Female: Sunglasses, Short/Long Sleeved (cropped) Rash Guard, Swim Bottom/Skirtini, and Water Shoes (optional). | Reason: Same with what I said on my 1st reason. // Worst / Male: Swim Trunks with a tie | Reason: It is getting closer to turning cliché. Using it combined with other male swimsuit is OK. || Female: Bikinis ! Reason: Not only that it looks ugly, very cheap, and bland, it feels uncomfortable, is overrated, overused, very old, and uninteresting, and has turned too cliché.
C2A! @Fletchosh for inspiration.