I personally think that plant based milks taste awful
Is it just the taste or the idea you're against?
I think the best milk is the breast milk. I think this because I'm a guy and because I don't like to drink those plant based milks.
It is perfectly normal to have dietary preferences. If you don't prefer to drink plant milk products, you should follow that desire. As long as you are happy to let others make their own choices, you should do what makes you happy with your diet.
I prefer cow's milk than plant milks but I drink it because I have to.
Breast milk is for babies so maybe you shouldn't go around advertising that as your favorite. People might think you're weird and that information is better kept to yourself. Just stick with normal milk for now to avoid scrutiny.