I have had a gut feeling with all mine and the 1st one to be confirmed by the scan is my last one...
I've been right with all of them, even to the point with 1st I couldn't give you a girls name, as it was a boy. 2nd we'd chose a girls name and OH chose a boys name and I kept telling him the girls name sits better... This time I had a name decided but we asked at the scan if they could tell us as I though it was a boy, she laughed and told me that I was right to be sure as we are expecting another boy...
My opinion is go with your gut... lol