I've spent a lot of time splitting with a big maul, but for me it's harder that it looks. I've broken two mauls by striking to far. And even with "soft" wood, I have stacks of green rounds that I couldn't split at all, the maul just bounces off. But I'm glad that you enjoy the process, I'd probably enjoy watching you work.
Next request, the wood could stack itself somehow.
I'm not super quick with a maul, but I can pretty easily keep up with the hydraulic splitter I've used. The hydraulic splitter is nice for the ones that have really gnarly, interlocked grain.
I hated it then but actually now I miss the time I spend with my father and brother.
The only thing I don't miss is rolling a piece of piss elm over to my city living "tough" cousins after two or three pieces of oak and watching the maul just bounce off. Always funny.
But the long term effects on your joints, even if you think you have perfect technique, its better to just get a wood splitter. We can do a whole winters wood in less than a day now, with minimal effort.
People overestimate how dry wood needs to be to burn correctly. Just have some ultra-dry kindling (seasoned for 2+ years) and you won't have any problems.
On the contrary, I know some folks who let all their wood dry too far, and it burned way too hot and ruined their stove (and almost burned their house down).
More water in the wood means less efficient combustion, more smoke and harsher smoke, which may irritate your neighbors downwind, or everyone around on still days.
Seasoned firewood will burn cleaner, longer, and more efficiently.
If you're looking for a meditative exercise try yoga.
Coming from a kendo background, when I had to chop firewood for a few years while living in the countryside, I generally focused on accuracy. The swing is completely different than with a sword, and getting the chop to land at the exact spot (I drew lines with a marker) tens of times in a row was very satisfying, but required a lot of conscious effort to get there. It's not trivial to land a chop at the exact spot you want, and it's also quite hard to ensure the axe travels at its fastest exactly at the moment of impact.
It can be fun, but you need to be into things like that in the first place; plus, having to do it no matter the weather and all the other things you need to do can kill all the joy instantly.
Most open-hearth fireplaces are tremendously inefficient, not only sending most of the heat up the chimney, but drawing in additional cold air in doing so.
A masonry stove with an external air draw should be far more efficient, and burn much more cleanly to boot. The pollution factor from woodstoves is another major consideration, and means wood-burning is limited in many areas.