It would, perhaps, be useful to know from which perspective you are experiencing these mannerisms. The left or the right seat.
Suggesting to a Captain that he practice his hand flying is probably not the best way to make friends and influence people!
If it is the Captain who is taking out the before start checklist before you ask for it then maybe that's a subtle hint for you to get a wriggle on, remember he is running the show with your help and things happen when he wants them to not vice versa. If it is the F/O who is being premature with the checklist then you tell him to wait until you ask for them.
Depending on your SOP's and who keeps their hand on the throttles during take off then it could be a wise Captain who keeps his hand behind them. Have you ever had a minor problem, one which is perfectly safe to fly with, approaching V1 only for the nervous, overreacting, F/O to try and close the throttles. "Any other problem bring to my attention and I (the Captain) will decide whether to stop or go". It's in the brief isn't it?!
"Oose flyin' this bloody aircraft?"
Oose responsible for it?
Faint wiffs of BO or boozy breath, oniony or garlic breath..
And that doesn't even merit a response. Oh bugger.