3-4-3 is terrible! Yeah, it's only an inch, and for my hips that doesn't matter much. But my shoulders extend beyond the width of the seat on 3-4-3, whereas 3-3-3 is perfectly fine.
Of course 3-4-3 uncomfortable for me, but I feel even worse for whoever sits next to me. At 6'0" and 200 pounds, I'm bigger than average, but I'm no giant. It's crazy to me that 3-4-3 on a 777 is even a thing.