I am a ninja, but I often don’t want to do sit-ups.

I am a ninja, but I often don’t want to do sit-ups.
I am a writer, but I often forget to sharpen my pencils.
I am a cop, but I often accept bribes.
I am a superhero, but I often forget my cape.
I am a scientist, but I often swipe others’ ideas.
I am a teacher, but I often dislike children.
I am a husband, but I often don’t love my wife.
I am a doctor, but I often care most about the money.
I am the son of a good king, but I often live as an ungrateful subject.