[nobody9999]

>How’s it work if you don’t spend half the year anywhere but spend the most time in FL or TX?

This site[0] should answer your question for the several states. In general:

   Most U.S. states require residents to pay income taxes to the state as well 
   as to the federal government. The factors that determine residency vary by 
   state, but usually involve a person having established their domicile in that
   state or having spent more than half the year there.

[0] https://www.annuity.org/personal-finance/taxes/residency-req...