I want to think about this more, but I think the two things that I'd say I look for in a great TV run more than anything are:
* high quality (not just in-ring, but promos, booking, and announcing)
* a sense of optimism
I think in terms of actual match quality, the Smackdown Six period of late 2002 is probably much stronger than any period in 2000 WWF TV, for example. But in 2000, everyone who got so much as a pop got a television main event, and there was a real feel of guys climbing the ladder and the company having exciting things coming in the weeks and months ahead. To me, that was missing in late '02. I think 1996 WCW and 1997 WWF did a great job of capturing both. I think Memphis produced the most exciting week-to-week TV I've ever seen, even during their down period. All Japan and New Japan TV was awesome for close to most of the 20 years between 1980 and 2000. Crockett from 1985-88 probably did the best job of appealing to my tastes in wrestling of any national wrestling company ever. Lots of different runs with lots of big positives.