Are my alright? (guys only!)?

im 15 and 4"11 and not fat. im inbetween slender and average for my height. i wear a 32 C-cup bra which looks a little big on my cuz im rly short. but it seems like all guys talk about is girls with like triple D-cups and Fs and stuff like that. Do guys only like girls with rly big s? i always thought mine were ok because the girls with big their's always sag and mine are like mad perky, but do guys like the sag?