Hum.. seems I'm one of the few folks that told the council to take their spectre-status someplace dark and smelly. DoubleRussia's statement hits the nail on the head. You return from the dead after 2 years, with serious PROOF of a reaper/collector threat - and they go all "Meh, not our problem" on you again. It just would've felt completely wrong being reinstated as a spectre "just because".. I safed their lifes when Nazara wanted to eat the citadel alive, ran every darn errant they wanted me to, played nice and silent all the way through pt1 .. and when I come back, they state that its none of their business? Now I even stopped the collectors from.. (duh) collecting all of the human inhabitants in the milky way. I'm definately not agreeing with what the IM or Cerberus wants the course of humanity to be (and the methods he's using) - but I would've felt like cheating myself if I had bow down and accepted the spectre-status again.
Nyoka is right, too: Shepard is nowhere near a superhero. She's a human with a mind of her own. I am curious what Bioware will do with all these loose ends in ME3.. I have the reapers visiting, I have Cerberus on my heels and I turned down the councils spectre offer - as Garrus ironically said: "You sure know how to make yourself new enemies". Well, I still think it was the right decision NOT to be the councils puppy again. Even though in ME2 it's merely a title with a few tiny references here and there.
The only thing I would NOT like at all is if Bioware relies onto "Spectre Shepard" in ME3 too much, as to the point that all those that declined the offer, cannot experience the same game content that those get, who regained spectrestatus.
Unrelated sidenote: It definately gave me a darn good feeling telling the unadorned truth, instead of humping their knees all over again.