The Vikings are about as middle as the road as it gets, but they're my team. It's a real culture shock going from a side like the Broncos and cheering on a team like Minnesota who are so irrelevant in the grand scheme of things. The only thing they have to crow about is their defence which is good without being elite.
The Saints always start the season slow and seem to play a lot better at home than they do away. Reality for a Saints fan is that you've got a ticking clock starring you in the face and the less time you have with Drew Brees, the less likely your side will come to winning another Superbowl. He was brilliant for the Saints last year, but he basically had to do it on his own and the defence as it's been for years has been pissweak. The Saints have made steps to try and improve that area, trading one of your star receivers to get a first round pick but it's a tall order.
I'm by no means a big NFL fan and I've still got a lot to learn, but just think about what got you into Rugby League and try to follow the same pattern.