Why is business/first worth it for you?

For me it’s a combination of being very tall and wide, absolutely unable to sleep unless I have a flatbed, much more comfortable airport experience, much less stress before and during flying, (mostly) no worries about selecting your seat, the feeling of the journey being much shorter, and an almost childhood goal of aspiring to be able to afford to do it (have no interest in fancy cars or whatever). What is your reason?