Some religious conservatives think that we are an abomination before their god (oh and jesus but do not call them poly theists because it ticks them off) but will not picket a Red Lobster. So no matter what we do, we are wrong and should be locked away from society (read: them).
If a M2F marries a man, they get up in arms because they consider it a gay marriage. If a M2F marries a woman then they get up in arms because you are in a lesbian relationship.
Since I have a wee bit of a sadistic streak I will usually use one or that other as a club in order to get them worked up into an emotional rage. Once the emotions take over, they lose the debate. I use a similar tactic to get anti gunners worked up during a debate. Cheap shots but fun for me.

Court wise it depends on where you live. Many courts go with the equation of whatever you were assigned at birth is your legal gender forever, no matter if the very same government allows you to modify the gender marker. Usually the issue will come up if someone contests the marriage and/or you married under another gender in the same state. If the issues do not pop up then you are likely to have a very normal marriage, until death do you part or divorce.
YMMV and it is always changing. Nothing is written in rock. Get registered and vote.