I had a nice stay at Orfeas' home. His flat is near enough the center to explore Athens easily but relatively isolated to avoid the noise, close to a small green area. I didn't need the underground most of the days, I barely used it to go to the port or visiting the urban beaches.
I've felt like I was at my own house, and this is a feeling that goes beyond the facilities found at my arriving: fridge, washing machine, kitchen, air conditioning... Orfeas was very kind since the beginning and his place was perfect to rest from my trips.