It depends on what your budget is? We're splurging on Hawaii because we think we'd probably never get there otherwise but we toyed with either Belize or Costa Rica since they're on the cheaper side but still absolutely breathtaking. St. Lucia and Barbados are popular for honeymoons.
It depends on your budget and what you are looking for! We already spent a week in Cancun this year, so we opted out of a traditional beach honeymoon. We are spending 7 nights in Italy, going to Tuscany the first half and then staying on the Amalfi Coast in Positano the second half!
We are doing a 7 day cruise! After the excursions and ports fees/taxes and alcohol packages it'll come to right around $2,600 through Royal Caribbean. They have a buy 1 get one 50% off right now, so book sooner versus later!