My cats love me to death. I never force myself on them and never try to train them to obey me, greet me etc.
We think cats are "unfriendly" because they do their own thing, and don't OBEY people like Dogs. When an animals doesn't obey you and do your biding, you think they are "unfriendly".
Cats are also not "reward" oriented like Dogs, i.e. you can't "train" a cat to obey you and do your biding by giving it rewards like you can with Dogs.
We think cats are "unfriendly" because they do their own thing, and don't OBEY people like Dogs. When an animals doesn't obey you and do your biding, you think they are "unfriendly".
Cats are also not "reward" oriented like Dogs, i.e. you can't "train" a cat to obey you and do your biding by giving it rewards like you can with Dogs.