Humans. Once you have humans there really is no getting rid of them. There’s nothing wrong with them per-say, but they just don’t take a hint! Most species see planets even a single degradation outside their standard gravity and they move right along. But not humans. Oh sure it will only be a few of them, but it’s like they take the discomfort as a challenge. Come back a generation or two later and you’ll find in equal measures, a people proud of overcoming a challenge and those who are bored and crave their own ordeals to overcome. I doubt any species doesn’t feel that drive, but most of us have tempered it. The galaxy is a big place, and most of us have grown accustomed to our own little spheres.
But those weird little apes have never been happy sitting still. They don’t even have the whole “youngest on the galactic stage” thing going as an excuse anymore, they’re just like that. I’d compare them to rats, but they introduced rats to the rest of us! A species that mastered interstellar flight, field manipulation, are arguably the best bio-techs in the galaxy, and they can’t keep vermin off their ships! Dalmas hasn’t ever had a human ship LAND and yet, rats.
And don’t even get me started on the ones who emigrate. Don’t get me wrong, they’re just as likely to be model citizenry as any, but they spark change. Not always revolution. Often as not they inspire a new culinary or fashion trend. I’ve always suspected it’s that same human ability to adapt to any situation that gives them this catalystic quality. Humans meld into communities they individually resonate with rather than creating human spaces. It’s not always for the better, you can get human nationalists real quick.
I think we can all agree the galaxy is certainly more interesting for having them, but to borrow an ancient human aphorism; “May you live in interesting times” has been both blessing and curse throughout human history.
