what your opinion about quitting coffee?

Hey guys.. Now I was reducing the energy drain from consuming anything and focus to do some positive activities for healthy body and brain. I have plan to quitting coffee because sometimes coffee gives good stimulation for my brain but sometimes it pushes me to watch p. I have question do you who quitting coffee replace it with something else like what is it? what is your opinion about quitting coffee?

other than that I'm not addicted to other foods and drinks, but even if I'm not addicted. Do foods and drinks that are too sweet and salty have a negative effect on our brains?