I haven't been to Athens in years, so am interested - although it depends on budget at that time of the year. I've already toured all the main events w/ a professor of archeology, but would be fun to do them again. Haven't done the Xmas market though.
I'm a points gal, so at the moment if I did make it I'd probably be at the Marriott (which also has a rooftop bar & pool overlooking the Acropolis), but again that might change depending on the budget.
Cheers.