You say he is a year old, right? Maybe he as just never learned "manners" as a baby. As kittens, we need to "scruff" our kittens in certain instances to teach then what behaviors ARE and AREN'T appropriate,such as biting hands, sneak body attack, grabbing food from us, etc. sounds like he may have missed his window in developing these social skills that make human interaction fun. Some can learn at an older age, but others are too stubborn and bull-headed. Good luck. Marilyn can help, in great depth, I assure you. I can "guilt" mine into behaving.
Thank you for your reply. Yes, he is still young. You could be right on his manners. I certainly appreciate what she did teach him as he is a good eater, fairly social (compared to some cats I read about) and has great litter box manners. I believe he has been through a lot of change in his short year, moving several times and when he was with her she was often out, either working or out socially so he was probably alone a lot. I think the stalking part comes from what she used to do with him and i'm not super worried, he doesn't always look at me like prey! He certainly can be stubborn but also affectionate, on his terms. I think most of these behaviors occur when he wants to play and is mad that we are not, or when he's not in the mood for petting and so scratches or bites.
We are slowly learning each other's ways. I'm trying the distraction technique someone suggested when he's fixated on something bad, instead of merely scolding him as that only makes him want to do it more. He keeps eating my plants so they have moved outside or elsewhere. I know it must be hard in a condo all the time. Growing up, my cat was indoor/outdoor and I feel bad for this guy but where we are and from what I've read, I wouldn't want to let him out. I never thought having a cat would be this hard but i'm sure at some point it then becomes rewarding.