We did Thailand which was brilliant. Bangkok/Chiangmai and Koh Samui. We didn't love koh Samui but still had a great time overall. We spent more than we would normally on a holiday to make it feel special. I fell pregnant not long after we got back so it's been family holidays since (although we did manage a child free trip to New York last year)
If we went again I'd love to do safari, perhaps combined with Mauritius.