Cruises to the Pacific Islands

Before people say we've sold out - my partner and I need a holiday with everything done! We're doing a cruise to the Pacific Islands and was hoping for some info about the best places to go. Essentially we like scenery, beaches, a bit of market shopping, appreciating the local cuisine and history etc.

Choices are -
Fiji
New Caledonia
Vanuatu
Tonga

And what are the best places? We live in separate states so need our time together to be all about us, rather than organising stuff....

Cheers

Hi Emberlie, Be sure to consider Blue Lagoon Cruises which visits the stunning Yasawa Islands.
This company has been around a long time and feedback on the cruises is great.
Bluelagooncruises.com

Many of the cruises advertised out of Australian ports visit Fiji, Vanuatu and New Caledonia. This might give you a taste of them, so you choose to return to stay longer.

I've been to Fiji, Tonga, and Vanuatu.

It depends where the cruise stops in each place. They'd all be nice, and to you, probably wouldn't be too culturally different.