In every league, you're going to have a group of teams that head and shoulders better than most of the league... I think Steve's issue, I'm sure you'll let me know if I'm off @stevemcqueen1, is he doesn't want to see the same group of teams dominate EVERY year.
I'm aware of New England's two-decade-long dominance in the NFL, but that's only because Bill pretty much mastered the system (and because he plays in the AFC East with the Jets, Bills, and Dolphins. That's another topic for another day though) but outside of NE, there has been a constant rotation of top teams in the NFL. It doesn't take a hard look to see that the hard cap for the NFL is the reason behind it.
Granted, things do seem as wide-open as ever right now, but all the top FA destinations are all being linked to the same teams except for the Clippers and the Nets, but we all know why they're in the mix now as well.