Pleasant cabin crew, very mediocre food and wine, ultra lame amenity kit, and a gin filled ceramic delft house gifted to you at the end of the flight as a souvenir. You’ll have a reasonably pleasant flight, but don’t expect to be blown away by the catering and amenities - other than the houses KLM is slightly behind Delta in each category.

I think you’ve made a smart decision on where to sit as a single traveler, as the center section is the only area where you’ll have aisle access and nobody crawling over you to get out midflight.