Hustling is "okay", as long at it never interferes with patient care. It's okay to be aggressive and competitive, but you must treat patients and not insurance companies.
I think I'm relatively successful, and although this is going to sound as "corny" as it possibly can, I can honestly state that I've never taken an x-ray, dispensed an orthotic or performed a surgery on a patient that I wouldn't have performed on a member of my family.
If you see every patient that walks into your office as a $$$$ sign, then I guarantee you that you'll practicing CRAP medicine and you'll also be looking at lawsuits. And if you practice this way, I hope you don't have a conscience, because if you do you'll have trouble sleeping at night.
While you are visiting or shadowing doctors, please don't EVER confuse doctors that are financially successful with "quality care". Sometimes the two can be on extreme ends of the spectrum.
I know of some brilliant, excellent doctors that are simply not good businessmen, and don't make a great living, and I know many DPM's that make triple what I do and I wouldn't let them cut my pet's toenails.
When you visit offices, you should get a "gut" feeling pretty quickly. If a doctor keeps patting himself on the shoulder.....bad sign. If a doctor keeps telling you how much he makes......bad sign. If a doctor keeps telling you how much he bills.....bad sign. If all a doctor talks about is his billing practices.....bad sign. If a doctor talks a lot about his new car, summer home, vacations.....bad sign. If a doctor appears to be "selling" a lot of services to his patients or "pushing" surgery, etc. ......bad sign.
If a doctor discusses interesting cases with you.....good sign. If a doctor walks into each treatment room and shakes every patient's hand.....good sign. If a doctor asks each patient "do you have any other problems or questions" before he leaves the room....that's a good sign. If a doctor talks academics with you.....that's a good sign. If a doctor asks YOU if you have any questions.....that's a good sign.
Anyway, I think you get it by now. It doesn't take long to make a first impression, and my experience has shown that USUALLY, your first impression is correct. Zebras don't change their stripes.