New York is always a tough choice for us.
I really like the spacious rooms at the Four Seasons (and they do have great service).
But, the Ritz Carlton Central Park has the best views, and a great club lounge. We also got engaged here.
Meanwhile, the Peninsula has the gym and spa I wish the other two properties had.
Usually, I choose on price between RCCP and the Four Seasons. Haven't tried the Peninsula yet...