Im thinking about getting implants because it's really shitty when you can't wear spaghetti strap things with built in bras because they only seem to make them for girls with C cups and my boobs are like...vanishing as we speak.
As someone on the other end of the spectrum... those shelf tanks suck. They offer no support that I see, and the manufacturers assume that small ribcage = small breasts. The few that I've gotten I usually cut the bra out of.