I have a 7 year old male Quaker named Quincy who is a PITA with his biting behavior. I`m not afraid of him, but I don`t like being bitten, and my DH rarely will go near him at all. I got him when he was 5 from an older lady who had 3 birds and wanted to downsize. So I got him, cage, toys, everything free. Not a bad deal. She did tell me when I went to pick him up that he is "nippy" when in or on his cage. She was able to pick him up in front of us (she did this with a towel) and then hold him on her hand. He went for her once, but she tapped him on the beak, and he stopped and was good the rest of the time she held him.
When I brought him home, he was kept in a spare bedroom with our sun conure and our BFA, and while he remained "nippy" in/on his cage, if he wandered off the cage and came over to visit me on my computer desk he was pretty docile. He even liked to sit on my shoulder and play in my hair.
I have to admit, my birds didn`t get a lot of attention over the last year and a half as my DH was diagnosed with cancer in March of 2006 and our lives were pretty much turned upside down. Things have quieted down, though, and we decided to move the birds out of the back bedroom and into the living room so we can interact with them more. Quincy, however, seems to be more than just a little "nippy" now, he just plain bites the crap out of anyone he can! I`m pretty good at avoiding him, and I know how to distract him if I need to reach into his cage for something. I would like to handle this bird more, but I don`t want to be bitten in the process.
I can`t pet him with my fingers, but one thing he REALLY likes is when I let him out of his cage, he perches on top of his door, and he lets me stroke him with a paper towel.

I only found this out by accident, but I`m glad he at least likes something about me.
Otherwise he is pretty hilarious, he doesn`t talk a lot, but he has learned to laugh, and it cracks me up every time he does it. He really loves his toys, too, and is a very active bird. Any advice would be appreciated.