I really have no problem saying I like Spongebob tbh, I mainly watch Spongebob because of how fluid the animation is, I also like the comedy in the first 9 seasons, not to mention it's one of the few nowaday kids shows starring adults, Spongebob is a good show and you should have no problem liking it. If people make fun of you for liking Spongebob they are just pushing buttons, or they could just be joking, but all in all, if bullies do actually make fun of you for liking Spongebob then they are just looking for material to work with, you don't have to be afraid to admit it.