I got a lot less comfortable flying after working in engineering for a major US airliner. I participated in an investigation as to why an engine suffered a catastrophic failure. The investigation was indecisive, the most likely conclusion being some mistake made in maintenance. There are still plenty of Boeing 757s with Rolls Royce engines flying so I don't think this particular event was indicative of an actual flaw with the engine.

Rather, what makes me uncomfortable, is that sometimes very important parts of the plane blow up and the engineers can't figure out why. But hey, at least there are two or four engines and three or more power supplies.