Bengals - Love these jerseys wouldn't change a thing
Browns - I honestly think the Browns are some of the best in the league they are absolutely awesome IMO, simple and gorgeous.
Ravens - I have no problem with their jerseys, I prefer when they wear the white pants with the purple jerseys but I really don't mind the black pants.
Steelers - Classics, perfect don't change em, just stop wearing the bumblebee ones.
Bills - Possibly the best in the league, should stick with white pants when wearing the blue tops but other than that gorgeous.
Dolphins - I like their colors, and I like the simplicity of the jerseys honestly wouldn't change em.
Jets - Don't like their Jerseys not a fan of the shade of green they use.. I just find it ugly. Could be my hate for the team.
Patriots - Some of my least favorite in the league, would like to see an overhaul on them.
Colts - Love em, one of my favorite shades of blue, love the dual stripe on the shoulders, they are a classic and are perfect in my eyes.
Jaguars - As everyone else has said, the jerseys are fine but the helmets gotta go.
Texans - I don't really have an opinion on their jerseys.. I don't like or dislike them..
Titans - Bottom 5 jersey in the league, should go back to their old oilers jerseys IMO, those were beauts. Also change the logo, its terrible..
Broncos - Their jerseys are just fine, though I think they should go back to the old orange crush colors.
Chargers - Powder blue.. stop talking and powder blue those fuckers right now!
Chiefs - Don't like them much, the shade of red they have is off putting to me.
Raiders - Classics, simple, leave em be
Bears - I feel as though the bears could really use an update. I find their uni's our of date and boring.
Lions - Love the colors think they could used to be re-designed. Bring back the black uni's more often too!
Packers - Never ever change!
Vikings - I love their new uniforms. Purple is my favorite color and I think they rocked these. Numbers are a bit odd but meh. I also loveeeee the matte helmets.
Cowboys - They need to stop with the weird teal, aqua, blueish pants they make no sense with the rest of their uniform.
Eagles - Go back to the awesome Green! Give the uni and updated style but go back to that green.
Redskins - I like these ones
but not so much their other ones.
Buccaneers - Honestly these are growing on me.
Falcons - These, always these and only these.
Panthers - These are in my top 5 favorites, along with the Browns, Bills and Bengals.
Saints - No really necessity for change they are pretty nice, but I wouldn't mind seeing an attempt at something updated.
Cardinals - I love their uniforms but I agree with Nate that they should change their logo, I think this one should be it
49ers - they are ok
Rams - Love the rams colors and helmets, jerseys could use a bit of a different look Imo. The design just doesn't flatter.
Seahawks - This rounds out my top 5 favorite jerseys in the league, they went from bottom 5 to top 5 thanks to nike. Grey ones are my favs.