.1 combat and other stuff from horseback (assuming theres gonna be horses)
Mount and Blade, should be a nice reference.
.2 werewolves and vampires and related quests e.g rivalry between the two
Underworld anyone? Would be great.
3. dragon taming, caring for, and riding, (like the morrowind riegn of fire mod)
I hope those dragon would be pictured as terrifying beings that you have to flee away, until the time you are powerful enough to be able to kill them, barely.
They are intelligent beings, like humans, so no taming. But maybe a unique benevolent one in some out of the way place, who knows. Might like to give you a lift or two to some places.
4. bieng able to affect and interact with the environment e.g. lite a fire to trap a monster
That would be interesting, but from what we have heard, it might be already implemented.