Flavor Abilities:
Sorcery:
As noted in the inventory section, I propose that he should keep the Cloak of Levitation and that it should remain animate/actively magical on the grounds that it behaves like a living creature and therefore qualifies as a canon pet. At full power, the Cloak would be strong enough to lift Strange, giving him limited flight capabilities (also, enabling it to drag him about against his will), and sturdy enough to block attacks made with bladed weapons without being damaged itself. In Norfinbury, the Cloak will retain its ability to move and act, including the ability to fly through the air independently of Stephen, to hang in midair when not being worn, and to wrap around and roughly manipulate objects. It will not be capable of lifting Strange (or any other heavy object) and will be rendered about as sturdy as any quality garment made of heavy fabric, nullifying its usefulness as magical armor. It will also be unable to fly any higher than an average human can jump.

In canon, Stephen is able to tap into a variety of magic powers (some only with the use of magically imbued artifacts), including teleportation, travel to neighboring dimensions, astral projection, summoning shields and weapons made of energy from other dimensions, and altering the flow of time. Given that all of these abilities represent distinct survival advantages, he will not be able to use them in Norfinbury. If possible, I would like him to be able to come tantalizingly close to calling upon his sorcery, namely by generating sad, useless little sparks in the air when he tries to create a portal or pull energy from another dimension (the sparks would not be useful for generating heat or lighting fires, and he would have to work quite hard to do even that much).


Mundane abilities:
Strange is a quick learner with an eidetic memory (that is, while his memory is not perfect, he has significantly improved sensory recall compared to an average person). He is quick to grasp and to be able to implement complex concepts and instructions. He is also shown to have significant (but not inhuman) linguistic ability; during his time at Kamar-Taj he learned to read ancient Sanskrit well enough to understand an advanced magical text and perform a ritual described in its pages within minutes of first reading it.

Beyond that, Doctor Strange is also a passable martial artist. He's capable of physically defending himself, but without his magic he likely wouldn't hold up very well against more experienced fighters, and he cannot strike with his hands without causing himself a good deal of pain due to extensive previous damage.


Disability:
While this is obviously not an extra ability, it's important to note that Stephen Strange has limited use of his hands due to extensive nerve damage sustained in a car crash. He is capable of performing tasks necessary for day to day survival (he will be perfectly capable of operating doors, for instance, and of dressing himself), and he is able to type slowly but clearly when he makes the effort. However, he has poor individual control over his fingers and he experiences nearly constant tremors in both hands that worsen under duress; he will struggle with any tasks that require fine motor skills. He also experiences chronic pain that comes and goes at irregular intervals, which he will treat with meditation and/or any over-the-counter pain killers he manages to find.


Suitability:

While Stephen has grown as a person and become more willing and able to set his ego (...and personal safety) aside for the common good, he will have a hard time coping with the loss of his powers. When he lost the use of his hands he obsessed over finding a cure to the point of financially ruining himself and destroying what few positive relationships he had because his life lacked meaning without his work. This time around he'll handle the loss of his abilities better due to his increased emotional maturity, but he'll have to convince himself that he'll eventually be able to get his powers back in order to be able keep moving forward.

Stephen is a problem-solver, and I expect him to actively work with others to find answers and help move the ongoing explorations forward. Being transported to an alternate universe and encountering people he considers fictional (not to mention a face twin in Sherlock) is something Stephen will actually take more or less in stride at this point in his life. While he will be curious about the town and its inhabitants and won't exactly be happy about the cold and the monsters anomalies, the core issue of finding himself in another world will not phase him as badly as it does many characters.


RP Samples:

I may have gone a little overboard. Please note that typos in Stephen's text-based communications are intentional.