Three things that are less discussed but are typical of Christmas here:
The frankly horrible villancicos played on loudspeakers and in shops - shrill piping children's voiced carols.
Polverones: Small cakes made of flour and sugar that dissolve into a floury and sugary powder in your mouth. Impossible to swallow. Watch for these!
Pascueros which are poinsettias - a plant which has somehow taken off rather like holly in England. Almería Town Hall, for example, has just planted 24,000 of the damn things in the city gardens.