fancy (someone or oneself) as (something)
To think of or envision someone or oneself in a particular way or role. Sure, I like to dance, but I don't fancy myself as a real dancer by any means. I don't fancy him as any kind of genius, although he would certainly disagree.
fancy someone as someone or something
to imagine that someone were someone else or some particular type of person. Can you fancy her as a zookeeper? I can fancy him as a tall, dark stranger. I really don't fancy myself as a farmer.