Monaco, Imola, Monza, Spa, Silverstone, Red Bull Ring (Austria) and Catalunya must always be on the F1 calendar. If it means sacrificing two of the lousy, ugly desert races to save just one of them make it so.
Azerbaijan gets my vote for holding a double header, back to back weekend event every year as well. First race starts by qualifying order, then the next weekend's race starts in reverse order of prior race finish. Except for this year, that race is always bonkers.
