I was one of those who watched Smallville back on the WB, but after around season 5 or so it started to wear a little thin. It stopped being about telling the story of Clark growing up and coming to terms with his heritage, and started being about the CW trying to desperately cling to ratings using an aging tentpole.
But then when the original showrunners left after season 7 and their subordinates took over in season 8, it was revitalized, and for the first time really started
being about Clark embracing and working toward his heroic destiny, rather than avoiding it as he'd spent the previous 7 seasons doing. And in season 8-9, it was a good show again. Although it kinda went off the rails again in season 10.