I go by the PC character unless told/informed otherwise. If you play a male character I use masculine pronouns. If you play female I use feminine ones. If you are decent/respectful and wish to have different ones used you're free to say so. You're more likely to get positive response from responding positively after all.

Getting butthurt because some rando on the internet that knows nothing about you calls you the gender of your PC is something that shouldn't be happening.

People also mess up and/or misspeak from time to time. I have a friend who prefers agender pronouns but every now and again I'll slip up and use masculine ones.