I would still go with season 7, mainly as I feel it has the best mix of well-written episodes (both funny, dramatic & heartfelt) and many of them being some of the series' best and that often absurdist Oakley & Weinstein style is great, making for a lot of clever moments & jokes throughout, but it is often that earnest, down to earth emotional content that really seals the deal. I'd say that 6 is second (or can alternate as #1), having the same colorful mix of great and fun episodes.