Helps that Coulson is a hugely popular and likable character. Without Phil, I don't think the show would be as great as it is. In these days of special effects, lots of producer lose focus that most viewers connect to the characters and keep returning for them, not the effects.Shield beat out NCIS and The Voice to be the #1 show in the 18-49 demographic. It was the highest rated new drama series in 4 years. I'll say it again. I think this show will be huge even without Thor and Iron Man.
I started watching it and it was lights out 5 minutes later.
I guess I am alone in this, but I found the first episode very bland. You get a high tech unit with a few geeky techs, some muscles, and wise/smart guy running the show. They go around and rounding up people with strange power.... and I agree that the ending part is completely predictable and corny. The episode itself is not bad, but not very exciting either for a pilot I think.