I haven't had too many bad experiences. For the most part, if I'm minding my own business nobody is really out to bug me. And typically I'd be at the game with a buddy cheering for the home team so that usually will be a bit of shield.
Just for the trip down memory lane:
Anaheim: Usually pretty relaxed although I've seen some fights break out during Kings/Ducks games. Amusing memory was being at the rink very early for a Devils/Ducks game and former Ducks GM Bob Murray was walking within in an earshot. He was on the phone, so I thought I'd be listening to some juicy trade talk. Nope, he was imploring his mother to go to the DMV.
Boston: Main memory is the tight seating in the upper deck. Also went to Frozen Four last year but that was a weird environment. Probably more a function of the Frozen Four than anything with Boston. Vendors also seem to interact more than other arenas.
Detroit: Squeezed in a Tigers and Red Wings game on the same day. It was a preseason game at Joe Louis, so probably not totally representative of the typical experience.
Los Angeles: Had one drunk guy follow me in the parking garage to yell some lame insults after a Kings/Devils game but that was pretty mild (pre-2012). Post-2012, I was eating in the arena restaurant and some guy tried to talk trash but I laughed it off. I recall seeing a couple fights in the stands/parking lot after the Kings were eliminated by the Red Wings in 2000.
New Jersey: I remember going to a Devils/Flyers game. Afterwards was having a friendly conversation with random Devils fan as we were exiting the arena. Then he excused himself so he could go fight a Flyers fan. It was a 'you had to be there' moment since he was so nonchalant about it.
NY Islanders: I went to the first preseason game at Barclays, so definitely more of a curiosity vibe than a normal game.
NY Rangers: Fun memory was taking the subway to the Yankee Stadium outdoor game. At MSG, average fan is a bit louder than on the west coast but didn't run into any issues. I've had cordial conversations with Rangers fans at Prudential Center.
San Jose: Only been 3x but don't have any bad memories. One bartender got on my case for not being a bigger Jeff Friesen fan. Good sightlines for upper deck. Went last year and the area around the arena seemed a little more barren than before. Seemed like some of the bars didn't survive the pandemic.
Vancouver: Went for preseason game with my friend (Sharks fan) and he got some friendly heckling. Definitely a different vibe before/after the game that is difficult to replicate in the south.
Vegas: Only been once but the overall experience was tremendous if only because it's Vegas. I went during inaugural year and Vegas fans were very hospitable.
Washington: Only been once (oddly have seen two WWE events there). Had good seats on the Caps side. It was quite a show watching Ovechkin launch one timers during warmups.
Also have been to Chicago, Florida, and Minnesota for the draft. Always a friendly atmosphere aside from a handful of aggressive adult autograph seekers. Aiming to go to Dallas in January. I was supposed to go last April but JetBlue ruined that weekend. [/coolstorybro]