What I don't understand about people like John_Smith is that if anyone was bored while doing their initial (CPL/IR etc) training then they are/were extremely foolish to continue in pursuit of a flying job.
If someone said they found the initial training (ie. flying) fun but had become tired/bored of airline flying I wouldn't have any problem with that, everyone is different. But there are many other sectors one can go in to other than airline flying, and whilst it might not be easy to get into some of them, as an airline pilot you at least have some experience and knowledge and should hopefully have enough sense to make contacts to get you into another sector with a bit of patience.
If taking off, sitting in cruise for a few hours and landing is boring, why not try fire fighting, instructing, air ambulance, regional, private/bizjet etc.
Sure most probably won't pay as well as the top airline positions but you will can still earn decently above the average wage doing other things.