Everyone I know has at least one strange habit when it comes to food. It might be a specific way you peel a fruit, prepare a dish, or eat your favorite food. For example, at a young age I picked up from my dad the habit of eating grilled cheese by cutting strips off each side and rotating the plate after each one. This way you gradually cut away at the sandwich while maintaining the same shape.
One of my other strange habits is that I usually only eat bananas on Thursday or Friday. This is born from the fact that I only eat bananas when they are very very very ripe, and I’ll buy them at the grocery store on a Saturday or Sunday. My wife will eat a few throughout the week and then once they reach peak deliciousness (at least as determined by me) I’ll eat whichever ones are left over.