I've eaten the same breakfast, and the same Sweetgreen salad for lunch (in 6-12 months streaks) for the past 5 years. The reason it works so well for me is the reduction in needing to make decisions every day, and feeling bad about having made the wrong choices.

I like this because this is in a part of my day where I need to focus on work, and being productive, and don't need to be distracted by food decisions.

I also LOVE food - so dinner, and weekends, are times where I actually love making decisions about where to eat, what to eat.