"Opinionated" means having strong or firm beliefs and expressing them with confidence, often without considering other perspectives or opinions. Full definition
My toddler is also very opinionated about doing his own thing. (simplymombailey.com)
So, this has been my long - winded and highly opinionated way of saying your baby is totally normal. (askmoxie.org)
In the Kings and Keys and El Vino's, there was no noise besides the clink of glasses and the raised voices of opinionated people, and of El Vino's this is still true. (firstthings.com)