I personally wear two pieces because I can mix and match them, they provide better tan lines, and I'm comfortable in them. Happy browsing
One pieces are nice for when you want to cover up for certain occasions. Maybe you only feel comfortable in a one piece. I support you regardless
Sometimes I buy tops and bottoms separately because different styles require different support, ya know? The bandeau type tops I usually size down, so that it holds the girls in there with ease. You'll learn
Sometimes I purchase bottoms separately because I want hem to sit lower/higher, or maybe I want my butt fully covered. Whatever the case is.
Sometimes I use covers, sometimes I don't. I love the look of them, and I actually do own a few.