hi,
Athens is a great crazy city! there are many things to see and also great night life! generally the lifestyle here is very outgoing and we are having a lot of fun, spending hours on cafes with friends etc. In summer the best time to be in Athens is in August, where all greeks are on holidays and the city is almost empty, only tourists move around, and very easy to explore as there is no traffic. Food is also very good but you should try to avoid the very touristic places.
Anthi