I am not an expert - but it sounds like he's trying to show dominance.
How old is he? My ducks have gone through some (to me) pretty distinctive phases in their lives.
Never had the biting or chasing though. My duckies talk. I listen. I try to understand what they are saying and to provide. That's a biggie. They want to be paid attention to as well as be independent. Think teenagers. Again, I don't know how old your guy is.
Where does he try to bite you? Maybe the hard bit is saying he's angry with your OR he's hungry, like starving to death. Ducks can be dramatic, ya know.
Tail wagging - mine do that when they are happy. But all of their lives, we have this on going thing about "shake your bootie!" So for us, it's a fun, right back at you momma thing.
Neck vibrating - anger.
Chasing - showing dominance. Territorial. This is MY space - back off. Are the other ducks around when he does it? Maybe it's protecting HIS space and HIS friends.
In your lap - my duckies have never done that. But I have had a few (adopted) chickens do that. For them, it was a show of dominance. They wanted me to know they were in charge and they could do whatever they liked.