I just finished watching the episode where Dean is working in an office and Sam is a telemarketer and I have to admit, been there, done that, seen it all before. This is, IIRC at least the third of these kinds of episodes where the boys are leading different lives.
SN just feels old now. I give the show regularly to my dad who also said the same thing. He felt it's the same thing, week after week. Couple that with the terrible angels and demons storyline this year where angels act bad and demons act good(oh look - we're trendy Hollywood - aint we clever!!!)and I think it's almost time for the boys to drive that big black car into the sunset for the last time.
I mean, how much more emo Winchester boys can we take?
Actually besides Dean's dream experience in "What is and what should never be" what are the other examples of the brothers leading "Different" lives?
And to your point about Angles being bad, well yes and no. Frankly they are just working on utterly destroying all demons (not just keeping them chained in hell) in a matter that we personally might find morally questionable, but in their eyes we are just tools to use. Same as how we see animals. I don't thank one can rationally try and place human morality on things that aren't human.
And for Demons being good, lets see. The show has featured to date how many demons? Well its over a 150. Just of those that are major speaking roles and thats over 30. Limiting t to just those who appear in multiple episodes and we have Azazeal, Ruby, Lilith, Allister, as the main players to date. How can one rationally say Demons are good? We have one, count them one example of a demon who has helped the boys, and the boys are of two minds of what her motivations are.
Hell we have more examples of Ghost and vampires being good, then any demons.
As to feeling its repetitive, well that is unfortunately the problem that effects all television shows. And I do mean all of them.
As for my personal feelings of quality, season 4 is easily in my book Supernaturals best season, with season 2 and 3 in about an even place (Season 3 more standouts but also lower lows, with season 2 being more consistent but hitting fewer high points) and then season one which is my opinion is frankly the poorest and the most repetitive of the series.
As to the complaints about the show being to emo, well it should be. And if the show wanted to really focus on the drama of the characters (instead of some of the humor and adventure) and treat the situations as realistically as possible they would be far, far darker.
In fact, I think with the set up of these characters lives and the events leading to season 4, I don't think one can rationally judge the show has being to emo, in fact I think one would rationally have to judge it has not being emo enough to fit the world and experiences these characters have been in.