I'm a frequent flyer, and have observed many discussions on other parts of this board by pilots and engineers regarding the relative merits (or not) of flying say over the pacific with two engines (e.g. 777) as opposed to say four on a 747. Despite reassurances, I always try to take such trips on a four engined jet.
The reality is, that the rationale for moving from four to two engines was money, and nothing else.
As for ETOPS, it gets longer all the time. What if the second engine fails during the 3 hours (etops180) (which is a long time to fly with a faulty aircraft).
I'm not a pilot or an engineer, but just someone who flies a lot, and I'm just not convinced about the whole ETOPS thing, and certainly not for 3 and a half hours (etops 207). I know others will disagree, but its my personal opinion.