I grew up in Erie, PA which is close to Pittsburgh, Buffalo, and Cleveland. So I'm also a Steelers fan and have a bit of a soft spot for the Brownies. Also a fan of the Packers because I see similarities between a place like Green Bay and my hometown of Erie.
Teams I hate are the Patriots, obviously. Dallas can suck a big fat one too. The only time I would root for Dallas is if they played New England. Also a hater of the Ravens, there's the Steeler rivalry and how that franchise shat on Cleveland.
My opinion of the Redskins has changed over time. I used to hate them over that Super Bowl loss. Then the SJW snowflakes started crying about the name but the Redskins franchise has been one of the few organizations with the cojones to stand up to the Political Correctness Gestapo.