I fly with an Ex Big Airways capt, who for reasons best kept to himself is an affable, relaxed, nice guy...when not in the left hand seat.
It has been my unfortunate experience to fly with this guy, who when the occasion presents itself for me to do a PA..i.e. when Im PF he produces this bloody BA PA sheet
Being a typical antipodean, my preference is to use my own style, be friendly, spontaneous..of course with the caveat of giving accurate and relavent information, all parceled up in a 30-45 second PA.
My advice is to be yourself, put yourself in the passengers shoes, its perfectly reasonable to wish holiday makers a pleasant stay, as it is to advise of any adverse weather en-route. Most importantly keep it simple
