Some more thoughts after my first cup of coffee.
Racial bonuses and Birthsigns. I would like these to make a real difference to characters. I like to play against type, but that means there should be an actual type to start with. For example my orc mage should have a much tougher beginning than an Altmer mage as a result of their racial bonuses. However an orc born under one of the mage birthsigns might reasonably choose that path in life.
Daedric realms: yes please. I would like vampires, werewolves, and other daedric creatures to have a much harder time fitting in on Mundus. The realms of their corresponding princes should feel like a more natural home than Tamriel for daedric-focused characters. Which brings me to…
More factions. My Volkihar vampire should be randomly attacked by Boethiah cultists, for example. Regular merchants (not under Thieves Guild influence) should refuse to trade with my character if he’s wearing Thieves Guild armor. A Thane of some Skyrim hold should have to give up their title in order to earn similar status in another court, but allies of their Jarl might provide honorary status. I suppose this also ties in with Consequences. Gaining bonuses from altars should mean choosing a religion first.
Khajiit: Let’s see some more of the different forms. Let’s get to play some of them, too!
And finally (for now), ARGONIANS! Not only can they breathe underwater, they should be able to see underwater with
perfect clarity as well. Their swimming animations should be crocodilian awesome, not the sad frog-like thrashing of the other races. I want to see submerged settlements with predictable current “roads” between them. Digitigrade feet, optional mid-game gender swapping, a special tail whip attack, and no mammary glands, please. Tamriel’s weirdest race has huge possibilities. I’d love to see Black Marsh as a completely alien world to an elf or human.