If you're comfortable with it, go for it! I also find bikinis way more comfy than tankinis. But alas, the third pregnancy really did me in, and I am not about to subject the swimming public to my stretch marks and stretched out tummy! I've been in mommy and me swim classes where some of the moms were in bikinis, and I didn't think it was weird at all. I was jealous, but I didn't think it was weird or inappropriate.