In terms of New York - the teams there are the Giants and the Jets. They both have big followings, but I'd suggest the Giants is probably bigger.
Miami & New Orleans your only choices there really are the Dolphins and the Saints.
The Giants and the Dolphins are both historically 'big' franchises though the Saints have seen a little bit of their own success in the past as well. All four of them are up against it a bit to make the playoffs this season but, of course, that shouldn't necessarily sway which way you go anyway.
The Eagles, who are an NFC conference team, have been my team for about 20 years - but in terms of the AFC teams I have soft spots for both the Houston Texans and Tennassee Titans through family, so I like to see them do well also.
Yeh I recognised Jets because of Big Daddy and like a billion other American movies haha. I will check out the jerseys actually because I tend to go off colours I like as well.
Noticed AFC and NFC too, is that PL/Championship in England, or W/E Conferences in basketball? Wasn't sure promotion/relegation was a thing in America that's all
