I had my previous TV roughly calibrated (just by myself with a disc but no fancy sensors etc). ISF dark seems a pretty good match out of the box so far. I can understand it might look dull or oddly tinted if you’re not used to it thoughNot colour blind but you got accustomed to bad picture settings. Some people even like Vivid modes! I'd guess most people probably are if they've never had a tv calibrated or close to industry standards out of the box. Any change would require a re balancing of your palette.
Regardless if it's what makes you happy keep rocking with it.
Worth trying to see if you can stick with ISF dark/bright for a week to see if you can adjust to it, but ultimately it’s subjective and your preference