Well, since I love baseball and live in NY, I love Cooperstown, NY
I also LOVE Vermont in non-skiing season - it's beautiful
I LOVE Mystic, CT with some great attractions and a quick hop to casinos.
I LOVE Boston - it's my favorite city to visit - it's a walking city with so much history
I LOVE New York City! There's so much to do and a lot of it is FREE - just pricey hotels. Same with Boston.
Have fun, whatever you decide!