If the strap is really obviously different from the top, it shouldn't show. If you have a strap that is fairly similar in shape, width, colour, it can peek out, but should align with the top strap exactly.
I want to get some of those jeweled straps. Or even the clear plastic ones aren't as bad. That will take care of a lot of issues I have with certain shirts. I have a pretty decent bra collection but there are only two that work with the tanks.
People say a lot about what they want their first impression to be. Piercings, tattoos, hair, clothes, makeup... We're ALL trying to make impressions of some kind.
My idea of a good impression might totally gag a goth chick.