It's a tie between 6 and 7 really. Season 6 was incredible and I don't think I believed my eyes the whole season, they actually gave us SO much Spuffy. My other favourite ships were never that lucky. What can I say, it was hot! Season 7 was just beautiful and while I wished for more intimate scenes between them (at least a kiss), I was blown away by how much intimacy there actually was, by them merely holding each other..