first four times i was right with my intuition (bbgg).
5th time it was twins and i would have said girl originally, so that morphed into two girls in my mind. at a 14 week scan we saw that one had a bud pointing upwards and one downwards, so tech said very likely to be one of each (they hesitate to say for sure that early). the upward bud was actually the girl tho, and the downward the boy. (or was that vice versa?! i just remember her saying it was the opposite way to what ppl think when they first see).
this time i had boy thoughts very early on, despite the pregnancy now being like my girl ones (mega sickness) but without the spots i got with them. so i give up on guessing. not intending to find out during pregnancy either
i have known people find out the scans were wrong and have to rebond after birth, so even with the twins i was hesitant to believe 100%. i never found out with any of the singletons.