I have a very small chest and am hoping that having kids might make them slightly bigger even after breast-feeding is done and all that. We'll see, though. Either way, no implants here. I can't even see that I'd need a lift later in life unless the kids thing really changes my body.
I have small boobs (large B or small C depending on the bra company) but I quite like them. I am athletic and can easily go braless even during exercise. They're also really sensitive to sexual touch, and I don't want to lose any sensation.
What I love about my size is that if I don't feel like having any cleavage I don't have to, but I can also easily wear a pushup bra and look like I have a lot of cleavage. I don't see myself wanting to change that anytime soon, but who knows I may change my mind as I get older