I know a lot of us came from Retro Junk. But is there other forums you frequent?

I've been on Retro Junk for many years and I'm also a member of the OfficalFAN board. I was a member of the Retroist forums for a while, but much like Retro Junk, they've died a slow death.

I frequent Fimfiction's group forums.

TV.com and the Acme Acres forum.

retrojunk was pretty much the only site where i was active. until some things went down...

This is the only forum I've been active at in probably ten years, before that I spent most my time at HorrorSpeak.com. I've lurked at RetroJunk and WrestlingClassics.com for many years as well. 

CAWS.ws

A My Little Pony form. It's mostly for selling and trading ponies.

I noticed you posted the question vkimo but didn't answer yourself. Frequent is too strong a term, lurks, haunts, or checks once in a while applies to these forums.

The Robert E. Howard forum http://www.conan.com/invboard/

Universal Monster Army http://www.universalmonsterarmy.com/

Classic Horror Film Board http://monsterkidclassichorrorforum.yuku.com/

Halloween Mask Association http://forum.thehma.net/

Masters of the Universe forum http://www.he-man.org/forums/boards/forumdisplay.php?2-Vintage-He-Man-and-She-Ra-Forum-%281982-2007%29

RetroJunk http://www.retrojunk.com/

Star Wars http://www.rebelscum.com/vintage.asp

GI JOE http://www.yojoe.com/action/

Boba Fett http://www.thedentedhelmet.com/

Board Games http://boardgamegeek.com/

X-Men http://www.uncannyxmen.net/

Wolverine http://www.wolverinefiles.com/

Comics http://www.comicbookdb.com/forums/index.php

Urban Legends http://www.snopes.com/info/whatsnew.asp

Indiana Jones http://raven.theraider.net/

Goonies http://thegoonies.org/BB/viewforum.php?f=2

Well, RetroJunk obviously for me... but also I occasionally check in at a few others:

Sydlexia.com
Retrodrome.net
BadMovies.org
PlaidStallions.com (Mego Museum)
I-Mockery.com

I forgot PlaidStallions although I mostly just read the blog.