There's a pause while Strange mulls the answer over. "I suppose it did," he simply responds. "I'd hate to lose everything I've gained since then."

Oh, there wasn't anything wrong with Strange before he was a magician. He'd probably run the estate and be happily married to Arabella all the while. But being a magician has opened so many more doors to him and gotten him knowledge that he never thought existed in the first place. It's given him a goal in life. So yes, magic did change that much about him, so much so that he can't imagine living a world without it.

"I was a bit flighty when I was younger." Still is, but point stands. "Magic's given me a purpose. I think that alone is enough to say that it's changed me."