I see your point, but sometimes a certain formula really makes a show work. Plus, they have tried to change things up enough or at least had interesting sub plots going on that kept me watching.
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The first couple seasons might have been the best episode-the-episode, but the season 4 finale (and penultimate episode), season 5 finale, season 6 opener, and season 6 finale (+ penultimate) were by far the strongest episodes of the show. The "formula" (or, y'know, being in a hospital with patients) was a backdrop for a lot of amazing writing and character development.
I do miss Cameron and Cuddy, though.
Im personally slightly glad it's over. I've never been so worried about every stomach upset, cough, bump, rash or bruise on my body being some horrifying flesh eating virus or something as I was when I marathoned House. Maybe now the paranoid insanity can end.
I liked season 8. Not as many penis catheders and eye needles as the other seasons which always make me cringe.