Lol, I don't think there will ever be an issue with me getting soft or my life getting more boring. I don't seem to be programmed that way.
I can't stay in one place or do one thing for very long and I'm literally never *not* considering new adventures to take on. I basically can't hear about anything without asking myself "hey, do I want to do that?" Like literally anything.
That means every person I speak to, everything I read, every tv show or movie I watch, whatever I see, I immediately start wondering if I want to do it. I consider literally anything and everything to be a possibility worth considering.
Essentially, I never ever default to whatever I'm doing as what I should be doing, not in terms of work, hobbies, location, anything. It's always all subject to change if a better option comes up. I have zero attachment to the status quo unless it's legitimately the better option. And how can I know that without considering other options??
I'm also married to someone whose reply to almost anything I suggest doing is "Sure, why not?" Which is how I ended up buying a house in rural Newfoundland despite neither of us having ever been here. That was a great decision, we're having an AMAZING time.
I'm severely disabled at the moment, so a few things have to wait, such as doing work up in the arctic in Iqaluit, which is very high up on the priority list. But in the meantime, I'm getting yet another graduate degree because I'll be in recovery from orthopedic surgeries for the next 2+ years and might as well get something useful done while I'm otherwise useless.
That will produce a credential that will allow me to do volunteer/humanitarian work all over the world if I end up physically able to. DH, is already figuring out what kind of NGOs he can work once he retires. Our list of global destinations for work/volunteer contracts is MASSIVE.
I already have good friends in Nepal, Ghana, and Peru who run schools and women's charities that I can easily do work with.
I have another degree I'll likely do later in life, plus a long list of certifications, and both of my professional licenses will require extensive continuing education, so I'll never not be busy with that.
Retiring has only made my goals more lofty, because I have more bandwidth for them, and I no longer have a clear delineation between work I have to do to live and work I want to do.
So no, I have no concerns about getting complacent in retirement. I've frequently been described as "terrifyingly motivated" and "freakishly energetic" when it comes to my utterly relentless drive to always be taking on new adventures and challenges.
As I've often said, I basically *need* to have some sort of project, or combo of projects to keep me busy, otherwise I can get into a lot of trouble.