Some other animal men with fun features must be added to the list:
Capybara men! Being completely amphibious and almost exactly the size of a dwarf is pretty neat. Sleeping in the middle a murky pool is helpful (and fun if its a cold biome). Hippo men are also amphibious, but they cant jump, are slower than the average creature and are also big enough to not be able to wear any normal armor. They are strong though.
Bear men of all sorts also seem to be able to climb with thier feet, which means you can fight and climb at the same time. Not to mention they are pretty damn huge and strong. Grizzly bear men seem to be the largest since polar bear men cant climb. You probably wouldnt want to start in a freezing zone anyway due to the water problems you will get.
I havent tried this yet but it seems many of the insect men, like beetle men, dont need to sleep (due to the [NO_SLEEP] token). I personally find this very helpful in adventure mode since waiting for dawn is much less dangerous than sleeping. Many of them also seem to be able to climb with thier feet alone.
Even though it says axolotl can regrow limbs it doesnt seem to be supported neither in the raws and in the game. Including for the axolotl men. They dont even seem to have regenerating tissues.
Cheetah men actually are quicker than the average humanoid. They are also exactly the size of a dwarf.
Echidna men are actually a fair bit thougher than most other animal men thier sizes and can go into a shell like tortoise men. Unfortunately they are 30% smaller than dwarves which mean that they are pretty weak and cant wear normal armor.