Why does my cat bite me gently

I have three cats but one most notable behavior is that one of my cats likes to “soft” bite randomly he’s a really sweet cat unlike the older one he likes to cuddle and play a lot and he’s about 3-4 years old. Usually greets me at the door when I get home and he’s very vocal. He doesn’t fuss when you try to play with him and usually if he ends up hurting you he will investigate. The reason I’m giving all this information is because I don’t know if this may have anything to do with his behavior. I don’t think I’ve seen another cat bite like he has, it doesn’t seem aggressive by any means he will literally walk up to me and bite my hand softly sometimes while I pet him sometimes just before I pet him. Any ideas?

I have a very sweet 3-4 year old cat who loves to cuddle and play.

He greets me at the door and is quite vocal. Interestingly, he has a unique habit of ‘soft biting’ me randomly. It doesn’t seem aggressive at all.

Sometimes he’ll walk up and do it while I’m petting him, or even right before I start.