parents and children will be there forever, a wife sometimes not..
anyway back on point. i like the work you have done looks good. you have a sailor jerry style work going on, old school tat work.
maybe for your father use somethign he loved to do, hunt, fish, cars something, and take it to your artist and have them put a old school tat twist on it.
daughter, maybe a mermaid or something to go with that style theme. just throwin ideas out there.
check out BMEZINE.com for tons of art galleries they are broken down into styles like old school tattoo art, newschool, oriental, etc. coud give you some more insight