I'm also considering moving to Debian from Ubuntu, both for my laptop and for my server. I feel so unsure as to what the correct option is, and I'm old enough to no longer be interested in tinkering too much ...
I'm using debian on server(s), laptop and desktop as daily driver for many years now. Definitely worth trying! On laptop/desktop I use the testing branch which is much more up to date and a rolling release. Although its called "testing" and I am not at all careful with updates, it has always been very reliable in my experience!
On my work laptop I have Mint. Seems to be much better than Lubuntu. Though I don't use Cinnamon, I use dwm everywhere. Still like Mint way more than Ubuntu.
But on every other server apart from the LXC VM is Debian, and always has been. It's rock solid, and blazingly fast. Minimal installs are always quick, come with almost everything I need, and you don't need to learn anything new in switching between them.
The only issue is slightly older packages. Many have backports, but not all of them.