Say someone were to make a game similar to, for example, TEF or FH, in the fact that it's based around animals and community. What sort of animals would you like to see? Should it focus mainly on one animal, or have multiple creatures to play as? Should there be some sort of theme? Would more realism or fantasy be more interesting? What are your favorite features of similar games?

Again, this is all entirely hypothetical and probably nothing will come of it. But it's some fun thoughts to toy with!
I've included a voting system this time for each idea, every vote will be marked with a |. There is no limit on how many things you can vote on, as long as they don't clash with each other.

Ideas to discuss in the comments:
Non-chat based interaction(Body language, facial expression, etc) { | }
Non-chat interaction + chat { ||| }
Difficulty-based servers (Ranging from No challenge/Peaceful to Hardcore) { }
Realistic wing movement and flying
Fall damage { | }
Reluctance to go certain places { | }
Replacement for invisible walls (Mountains, strong tide, rough wind currents) { |||| }
NPC hunting in place of players being hunted { ||| }
Hunger/Thirst/Health system { || }
Sleep system { ||| }
Ability to play as a child { || }
Ability to go through a lifecycle, up to adulthood { || }
Singleplayer challenge modes { }
Ability to turn certain aspects of the game off { | }
Pregnancy { || }
NPC mates { }
Player mates { || }
Stamina { }
Optional wings for all creatures { | }
Singleplayer + Multiplayer options { ||| }
Fantasy and Realism servers { }
Unrealistic markings+colors { }
PvP area and/or server(For hunting/being hunted) { }
PvP options(Can be toggled on/off) { }
Status tags(OOC, AFK, etc. Can be toggled) { | }

Suggested themes:
?

Suggested animals:
Dragons { | }
Gryphons { | }
Various birds { || }
Horses { ||| }
Donkeys/Mules { | }
Canine { | }
Deer { || }
Feline { | }
Hybrids? { }