My experiences are largely of Hope Island & Paradise Point.
Paradise Point: on man made waterways so lots of rentals with pontoons, esplanade with coffee shops and restaurants, large open park beside water with enclosed bay swimming area, all in all lovely community feel, St Francis Xavier primary in Runaway Bay is just fantastic with good facilities and a good head master
Hope Island: again a lot of man made waterways and a few golf/tennis resorts in gated communities, a high proportion of retired folk zooming around on golf buggies, has a Florida holiday resort feel to it. it's a popular area, pretty but just not my cup of tea.
Good luck.