What forums do you go to besides this one?
I spend some time at reddit and the longneck board, do they count?
none
My local neighborhood forum a couple of months ago was the go-to place for lost dog announcements, garage sales, and kids looking for baby sitting jobs. Since then it’s degenerated into the townsfolk sniping at each other over a proposal to build a new school, McMansions, and complaints about Amazon deliveries.
I go to airliners.net, but I mostly lurk and just post very occasionally.
I check in on reddit. Mostly to look at cute cat/dog pics & videos. One of my faves is r/babycorgis. 
Damn, they are the CUTEST puppies!
I also check in on the forum for my city. But that whole board is so chaotic and overrun with the illiterate, unwashed masses. Someone can post something beautiful and sweet and very soon, some jerk will post something cruel. A woman posted about her sad and trying situation at 4 am when I was up because anxiety was keeping me awake. Soon some people got on there and trashed her. Then the mods took down her original post.
Of course, the whole place is so VAST that you can usually find a civil subreddit tucked away. The ones on tea and espresso are nice. There’s moderation, but not dispensing swift justice as it is done here.
Why Giraffe, of course. 
I’m also on a forum about D&D and a D&D-based webcomic.
I can recommend some cancer support boards if you’re interested.
I can recommend some cancer support boards if you’re interested.
reddit.
I used to go to a forum consisting of people I met on a fitness forum years ago but haven’t been there much recently.
But mostly here and reddit.
I used to love the IMDB forums but now those are gone and moviechat isn’t the same.
I loved the IMDB forums. I guess too much trouble and no revenue for them.
Mainly the sci fi/fantasy focused boards Spacebattles and Sufficient Velocity (sister boards, the latter split from the former for several reasons). Sometimes the Order of the Stick forums, although it’s been a while. I’ve been to the Giraffe Board a few times, mostly when the SDMB is down; never became a member, though.
Fark.com, mostly the politics and entertainment boards.
Since the OP also started this thread:
…it makes me wonder if he needs a list of where to go after he’s banned from here.
Another vote for none. I used to read Snopes all the time, but it isn’t what it used to be. I took a look at Giraffe - seemed OK.
j
I routinely look at Model Cars Magazine Forum. But only for the pictures. The posts are mostly useless. Everyone always says a model is “excellent”, even if there is only one grainy dark photo. And if you dare say that a new kit has flaws, they practically ban you.
Mostly good model cars though.
I used to visit a Jeepster board, but I don’t have a Jeepster anymore.
I do still go to a Red Sox board.
That’s what they ALL say! 
*
Sorry, couldn’t resist…*. 
International Skeptics. This was originally the house board at randi.org (JREF, James Randi Educational Foundation), but they no longer wanted it, so it was cut loose. It is hosted privately now (in Sweden?).