Well Mickyman, I'll tell you mine. Ryanair brought forward the time of my flight home to Spain by two hours without informing me, thus causing me to miss the flight. I had to buy two new tickets for the flight the next day[one for me and one for Mrs Wowzz] plus hire a car for a day in order to stay with relatives over night.
Ryanair desk at STN stated that I had been informed by e-mail of the change in flight time. Two years later I am still waiting for the e-mail to arrive.
As much as anything it was the sheer attitude of the staff that made me angry - it was all my fault and if the e-mail didn't reach me, well that was my problem, not theirs.
Never again!