I'm a loanee, so I can't speak as true 'Olympiaki', but having lived and worked with them for a while now (on wet lease and in their aeroplanes) I can offer a bit.
The Q400 is now going to be the mainstay of the fleet, as for a multitude of reasons, the Airbus didn't work out for them. The Q fleet is a lot of fun, with some very friendly captains, a bunch of cabin crew who can't do enough to help and some challenging and interesting flying. The approach to the operation from the skippers can be different at times for a western European (a creokolos as you'll soon learn in Greek) but they're also excellent pilots in the main and a pleasure to fly with (you'll be bought a lot of freddos on turnarounds). Athens offers a lot of opportunities in your spare time as well.
Now for the downsides. Olympic management seems to have never got over the previous incarnation of the company as a government owned airline. The waste and inefficiency at times beggars belief. Unfortunately they are hugely resistant to change and you will grow tired of hearing the twin excuses of, 'We did it that way in the Old Olympic' and 'This is Greece, it's different here.' There can also be an utter paralysis filtering down from on high where decision making is concerned (a key factor in losing commercial opportunities in my opinion). The logic being, if you don't make any tough decisions, you can't screw up and get fired.
This has all contributed to morale being poor recently. The Airbus guys are all looking for jobs, many of the cabin crew are being made redundant and the remainder of them are managed through a culture of fear and informing on each other (something we in the front have complained about on safety grounds).
I hope I'm giving a balanced picture of life here and I'd advise you to see how it fits in with your lifestyle. The Greeks in general can be one of the most frustrating groups of people to work with I've ever met. They can also be some of the warmest, most generous and absolute fun people you will ever meet.
It's fair to say I like them hugely (as I've been in a relationship with one for over a year now!). Best of luck
