Absolutely! I had a date with an HB8 last night I used a lite neg on her nails saying, "Nice nails, how often do you get them put on? they still look nice." Then a small neg saying she looked like a cute marshmellow in this white poofy, ski coat she was wearing. I also did one, "You're pretty tall, what are those like 3 inch heels?" I know I don't really need this many negs but she was kino pinging me after getting me my objective.
As you know it really depends on how the HB views herself and her own self image as to how many negs are really needed. With HB7s and HB8s I will neg but I won't use harsh ones at all, just doing it to keep it playful. You'll be able to tell pretty quickly when you're getting results from it and when you just pissed her off.
You're on the right path, keep it up!