Ryanair hasn't had a single incident involving harm to its passengers and crew in it's entire 20 year life. Also, if you're worried about Ryanair, don't fly with Ryanair.
I've had some pretty scary experiences in planes. When flying to Edinburgh a couple of years ago, we got the seat next to the emergency over-wing escape hatch for the extra legroom. The flight attendant left a key in it, which had big red tape attached to it saying "WARNING: REMOVE BEFORE DEPARTURE," which got us a little uneasy. And then, after we took off, masses of condensation starting streaming into the cabin from vents in the ceiling, which scared people. But there was never any real danger at any point.
Also, when flying back from New York last February, the fire alarm in the toilet at the very back of the plane went off. It was pretty freaky, the moment it went off -all- the cabin crew got out of their seats and rushed to the back of the plane, frantically looking around while the guy in charge of them was on the phone to the captain. We stopped climbing at around 5000 feet and just circled above the sea north of Long Island for about 20 minutes until it was sorted out. It was just a false alarm, though.
All in all, just remember that flying is the safest mode of travel, bar none. Any fear of it is completely irrational. The only reason people are so worried is because -every- crash that happens gets intense press coverage, so people think it happens more than it does. You're way more safe in a plane than in a car. By taking a bus and a ship to travel wherever you went, not only did it take 3 days instead of 2 hours, it also put your life more at risk.