I suspect actually there'd be a lot of agreement about what makes a good campsite. Yesterday I went from a quietish campsite with lots of grass and space and trees and a panoramic view. The next campsite on was full of semi-permanent caravans squashed together on gravel haed standings and resembled a shanty-town (you've toured Italy I'm sure you know the sort of site I mean). OK it might be bearable for a night but would you actually stay there if you had a choice?.
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EDIT: And as for hostels put it this way, I syayed at a lovely hostel on an island/nature reserve on the Lago Trasimeno in Umbria. Panoranic views over olive groves, over the lake to the mountains beyond. The only drawback was that the first boat in the morning left at 9.30. Is it a place I'd want to recommend to other touring cyclists and I think others might want to know about. Absolutely:
http://www.fattoriai...om/home_eng.htm