Lots of trees, large isolated sites, no camp pad (put the trailer wherever is convenient - ala Algonquin PP, Pog Lake CG), direct water access (lake, river or stream, as appropriate), view of water, access roads that are arranged in such a way that there's very little traffic on any single road except maybe a central artery, large clean bathhouse with laundry facilities that work well, very quiet (no road noise - I want to hear the animals at night and the birds in the morning), a variety of hiking trails with varying distances from hour-long easy hikes, to day hikes, to overnight hikes, to multiple overnight hikes, and the same for kayaking and kayak camping, some trails hilly/mountainous (not too extreme - very close to the ideal is the hiking Acadia NP in Maine and the kayaking at Lake Superior PP in Ontario).
Don't care about electric, water, pavement, or other amenities. If they're there I use them, but where I camp they're usually not there.