Hi Diesel, I have also been a cat person most of my life. I have worked in cat rescue for 20 years, fostered and taken in multiple strays. Maggie was my first puppy.(She is almost 2 now) She played rough too, as I guess most puppies do. She just gradually learned to be gentle. We said ouch, quit playing or substituted a chew toy. When she was through the teething stage the biting on hands and other things got much better. There was one incident about 9 months ago when we were clipping Maggie's nails. She hates nail clipping and she turned around and got the skin on the back on my hand in her mouth. She didn't break the skin but she did put a lot of pressure on it and turned the back of my hand black and blue. It hurt enough that it brought tears to my eyes. At the time, Maggie didn't seem remorseful but now if I say ouch about anything she is very distressed, runs over to me or follows me around looking worried. This afternoon she stole a paper towel off the table and stuffed the whole thing in her mouth so I couldn't get it. I put my hand in and took it and although there was a little growling in protest she never put the least pressure on my fingers. So they do learn, it just takes time. Try a few of the methods you have read about and when you find one that seems to help a little make sure everyone in your house is consistent every time. The biting will improve. Enjoy your baby. Its a lot of work now but well worth the end result. ( I still get a lot of teasing because I have handled feral cats, medicated them, treated for ear mites, clipped nails but I take my sweet beagle to a groomer for nail clips.)