Its good to ask for feedback especially after every interview. It shows that you might want to learn where your mistakes are and that you are open for criticism. This trait is quite sought after especially in consultancy firms where they like the candidates to ask a lot of questions and always ask for feedback.

LOL I remember my last interview I went, I asked super a lot of question and ended up spending 30minutes interviewing my interviewer instead 

If you are curious, I got the job