if im playing i khajit (wont ever happen but some people do) my character should feel fast and sleek kind of like how aliens in AvP2 were faster than the marines which would be where most other races are at and the predators were the slowest sort of how argonians and orcs would be.
why argonians dont swim way faster than the other races if they are partially adapted to it. they need to lower the swim speed since it was ridiculously high in oblivion but keep it much faster for argonians. since argonians are disease resistant it would be a far reach to give them an armor bonus as well since they assumedly are covered in scales.
khajit should be able to jump much higher and run slightly faster than the other races since my cat used to be able to jump from the kitchen floor to the top of my fridge in one effortless leap. that is several times her height. shes old now so i dont think she can do it anymore.........at least i havent seen her try.
orcs should be able to swing weapons especially heavy weapons faster than other races because of their strength advantage also have a higher damage threshold and maybe slightly higher encumbrance.
i dont see huge differences between the human races and the elf races beyond cosmetics but you could probably make differences there as well.
edit: removed stuff that didnt make sense...... :hehe: