You would definitely do better to join the FB page, Maldives Holidaymakers. Posters there tend to be knowledgeable about a range of islands whereas here people will recommend the only one they have visited.
There are so many factors to consider, big or small island? Water bungalow (more expensive) or beach bungalow? Close enough to Male, the capital and airport to travel to your island by boat ? More distant islands require a seaplane transfer, more expensive but fun.
You really need to decide on your budget, as there is a huge variation.
We have been to the Maldives ten times staying at a variety of islands, from the budget - Biyadhoo, like a posh french camp site, to the fairly expensive (for us) Thudafushi., Italian owned, wonderful food, and very good all inclusive drinks and activities
Be aware that ‘all inclusive’ is not usually as all embracing as say, in the Caribbean resorts. Often a limited range of cocktails.
Kuramathi as suggested upthread is worth considering, also Vilamendhoo, and certainly Reethi Beach. Personally I would avoid Meeru; for some reason UK high Street travel agents push people to go there, but it is usually considered to be very ‘entry level’. The main problem is that the reef, where the best snorkelling is found, is not close to the land, so you are reliant on the island’s boat to take you.
Snorkelling is what many consider to be the best feature of the Maldives and you want to do it whenever your fancy not according to the resort’s timetable., I would also say avoid Sun Island.
Getting there inevitably involves a long flight. Check out some of the specialised Maldives agents, Simply Maldives, Magic of Maldives etc.
Be aware that you will inevitably catch a nasty disease called Maldivitis. Only cured by a return visit.