I'm British so which NFL team should I support?

I like NFL. Its cool and everything but I've always sat on a fence not knowing who to follow and who to like, I want your help to suggest teams that I would like. I have been doing some looking and so far I kind of like the look of Detroit Lions because I support a football team over here (soccor) called Chelsea FC and we also have a blue lion as our club symbol. Please leave me your suggestions here and also let me know if they Detroit Lions are actually any good. Thanks!