Minecraft is playable with 30-40 FPS, but to have a real experience rich 60 FPS also not out I always recommend 120 FPS then everything runs clean and you don't get burglaries.
I think that the higher the FPS, the better, because the more stable the picture, the more pleasant it is to play. In Minecraft, the cubic graphics are all in pixels, so if the FPS is still very low. The very low frame rate is generally terrible, its a pain for the eyes, so I think the more FPS better minimum should be 40-50 something like that