Went to Curacao a few years ago. Would go back, but, it has a different feel than Aruba. Great history and buildings, good shopping. Can't remember the wind. Beaches not as nice. Fewer iguanas. They still eat them. We stayed at Breezes so didn't eat out.
Seaquarium was cool.
Also went to St. Kitts a couple of years ago. Very different. Marriot is beautiful and everything else was "old" Caribbean. Hot sand, only one calm beach. Not known for service there and business owners complain that it is hard to get good help. Beautiful island and worth a trip to Nevis while there. Casino at Marriot and beach bars at Timothy Beach.
Walt