Asking for your feedback on your interview time to time does not make bad impression. The only things you need to be careful about interval. So after an interview if you have not received any feedback within a week, next week shoot an email to get feedback. Then wait

Sometime it take time to decide for go or no go, because it depend on multiple factors like No of candidates currently in pipeline, how well did you perform, person take interview might went on leave comes back next week then write your feedback or give decision.

But asking quickly and frequently, make you greedy and that will be a slightly negative, that HR will be used in salary negotiation, as they know you are greedy for the job or just want it badly.