Lissi you have a point, and i agree that there are many advantages like the proximity to a big city (with all the options that this gives to you).
And probably as you mentioned at the end of the season is nice. I have been there only 2-3 times "gia mpanio" during july and it was very very crowdy, thats perhaps why i have this negative feeling.
And you can go for a dive in the lake of vouliagmeni ( very close to varkiza
)