Best map/difficulty for next run after "beating" Terra on easy

Hey all,

I have both DLCs and for my first few runs played with them enabled but started on Terra, on survival mode but the easiest difficulty. I've got the hang of basics now like SPOMs and Aquatuner/Steam Turbine for cooling my base, launching rockets to space, plus my own methods for taming & utilising the various volcanos and geysers.

I'm now on cycle 450 and think I could be self sufficent from this point onwards. Two natural gas geysers, a copper volcano and oil wells for power, multiple water sources for oxygen generation, CO2 geyser, sulfur volcano and water for slicksters/sweetles/bristle berries for food. And stress/germs seems completely irrelevant, I don't think I've ever had a dupe go above like 20 or 30% stress and I haven't had to touch decor or any morale-boosting things other than the basic rooms.

It seems like it would be fairly trivial to now automate everything to the point where I could just go away and come back hundreds of cycles later and everything would be running fine (by all means please correct me if I'm wrong, maybe new complications I don't know about yet would arise!)

For my next run, I'd like to be forced to think outside the box a bit. Like, see what natural resources I have access to and have to come up with slightly more complex solutions (e.g. I have abundant amounts of X and not much Y, but I can turn my X into Y by going via A, B and C).

It'd also be nice if I had to think about decor/morale/stress a bit more. Even if it's just little things like making sure my wires are hidden from the rooms my dupes spend time in etc.

I'm NOT interested in having to micro-manage or abuse mechanics or use super advanced methods that you'd only be able to do after watching a tutorial, I just want to have a bit more of a challenge than I had so far.

Any suggestions for which map/game mode/difficulty I should play next?

Thanks in advance!