I've personally only been to Prudential Center, Capital One Arena, and Rogers Arena. For amenities, I would say prudential center, but for fan experience I'd say Capital One arena.

Bell Centre. The Dejardin section is hands down the best vue.

I've been to the Bell Center ( Montreal ) and the Canadian Tire Center ( Ottawa ) and it's definitely Bell Center

I've only ever been to the PNC, so it's hands down the best for me lol.

Rogers Place

I've only been to Amalie Arena (Tampa) and BB&T Center (Florida) and Amalie is better in every department other than parking around the arena.

I've been to Prudential, Bell, MSG, Capital One, United, and Nassau. As a Devils fan, it pains me to admit this, but Nassau in the playoffs is surreal. The atmosphere is electric and the fans are knowledgeable and beyond intense. The fan experience is amazing, despite the relatively poor amenities and rough travel from NJ (MSG is a 1000x easier commute). I would say Bell is #2, but Habs fans are far more civilized than Isles Fans (no offense) and it's a more tame atmosphere. Still an amazing experience with all of the history and French culture.

I've seen (from outside)
Prudential Center
Barclays Center
MSG
Capital One Arena
Amalie Arena
BB&T Center
Bell Centre
Canadian Tire Centre
KeyBank Center
Scotiabank Arena
TD Garden
Wells Fargo Center

From outside Barclays Center and Amalie Arena are the best

I've watched Hockey Games from
Prudential Center (over 100)
MSG
Scotiabank Arena

I would like to say Prudential Center is the best because when I went to Scotiabank, it was the World Cup of Hockey so it was a little different environment compared to a normal game. And when I went to a Rangers playoff game, I had terrible seats.

I've only been to the Bell MTS place and Scotiabank arena.

I was only 9 when I went to Scotiabank arena so I didn't pay that much attention, but it's probably the best.

I have been to so so many arenas but honestly got to go with the classic MSG

Of the ones I've been to:
Vegas (great location, the pregame show, etc)
STL (did a baseball/hockey double header day, didn't have to move parking spots, lots to do in the area, walking beers, was an excellent sports day)
COL (good location, Denver has a good transit system, seeing Nino's G7 winner help a lot)
MN (it's nice, lots of snoopy stuff, great atmosphere if they are playing the Jets, location is meh)
CHI (I hate the goal song, felt like I should be watching basketball not hockey, seeing the Bulls stuff was neat)
FLA (I liked the arena a lot, just the location of it is awful)

I've been to BUF, but not counting it because it's been so long (they were a Playoff team). I really don't know what it's like there after a decade of bad hockey.

I really want to go to CBJ and NSH next.