I guess I'm a little more particular. I prefer tan lines except------when wearing a backless or bare shoulder dress, no visible lines. So when tanning, just keep your breasts covered a little. It will give a nice contrast when BCD, but you'll look tanned when wearing a variety of tops.
In a sheer top, you'll look great, too.
Also tan lines that show you've worn a little bottom add to the sex appeal when the clothing comes off.
Like others have posted... I love tan lines just for the reason CoHorn posted! It just brings out so much in a woman's body especially one like yours Tara.