the lore really appeals to me (so much flavour text about the shee! also the teaching heads? more shee designs/characters??<3) the bg music is really calming, the breeds appear to have specific voice pitch modulation (which is cool because you don't even necessarily need to see a norn in the 3d space to pick up if it's in an area c: )
and generally it seems very bright and happy. I'm also really, really stoked that we finally have some in-game control over splices, and the return of being able to actively watch your creatures health life-kit style in game more easily! Also oh my god the foods list their chemical content... I could ramble so much aaah..
creatures caves is your #1 resource for the creatures artificial life game series: creatures, creatures 2, creatures 3, docking station, and the upcoming creatures family.