First of all, Athens is a European capital with a relatively young population and warm, friendly inhabitants. Most people speak English very well, so there's no problem here.
We arrived in the capital in February, and to tell the truth, it's best to travel well equipped with warm clothes, as winter is pretty cold.
Athens is a very green city, with many well-kept parks.
The cost of living is around 30% lower than in France, which is a real plus compared with other destinations such as the Nordic countries.