YTDAW ‘Your Tax Dollars At Work’ although i only go on that one for CSI spoliers =P
and i also mostly go on the twenty four forum, really awesome site
and De La Mare Productions, great site for film makers
Monkey See, Monkey Fu! Forum. I love that place. ^^
I sometimes hang here and there. I hang out in most places. I mainly lurk at alot of other spots, though. My most popular hangouts is my LiveJournal, my DeviantArt account, and here. I like to scope out MMORPG.com and I like OnRPG’s forums, as well.
I rarely post, though… because I’m so shy and nervous. So I tend to lurk… 
Most recently, I signed myself up with an RP forum called Mundane and Fantastic. It is an Incredibles Role Playing site. If anyone wants to join, please do. We need players.
umm aim sometimes only theres no one to chat with umm… zodiac girls (tell them fuzziducki referred you if you end up joining!!!)
I’m a member here & on the No Doubt Community
About four more … maybe five.
4chan 
facepunch
bhf
jolted
I’m a member of:
Muppet Central
and a Spongebob Squarepants forum.
I don’t really understand how to use them though
Eggxpert (somewhat)…really got into it when they announced it about a year ago. Was one of the top posters.
other then that not much.
Oh goodness, where do I begin? Well, I suppose I’ll begin at the beginning…
Guide Posts 4 Teens.com - A Christian-based website that is now deceased. It was the first forum board that I was ever a part of, and I made a handful of wonderful friends there. Unfortunately, after a few years, the founders of the website (which also produced a magazine known as Guide Posts 4 Teens) came to the realization that more girls were attending the site and reading the news slip than boys, and so they changed their once universal forum to a “female-friendly” hang-out. All of us members’ old posts and hilarious conversations were sent to the scrap pile, less visitors browsed the boards, and almost all of the old members (including myself) simply left the site due to utter disappointment and a general lack of interest (I think). Some time after, the administrators and moderators of both the website and the magazine decided to close their doors for good. As far as I’m aware, the site hasn’t returned since, and I’ve never been able to find or get in contact with my old buds, save one, whom I might still be able to reach given the opportunity…
Council of Elrond - During the years when the Lord of the Rings trilogy/films was/were being released in theaters, I became something of a Tolkien-addict. Consequentially, I hunted for a website that shared similar interests and, thankfully, I found one, entitled the Council of Elrond. I made plenty of acquaintances/friends there, as well, and had a great time conversing with all of the other Lord of the Ring “geeks” that visited there. To date, it’s the craziest and most hilarious website I’ve ever been to, and it remains one of my favorite websites to this day, right after Pixar Planet of course. (heheh)
Although I haven’t visited the site in a while (and only occasionally pop in to say “hello”), I was there long enough to become a part of a highly unusual “cluster” of fans who both harbored and promoted acts of randomness. A couple of these dudes invited a few people to join their “club” and become a part of their then-new website they were building, called the “STCP” (Spread the Craziness Program. I think that they have a billion people involved in the thing now, although I have the privilege of stating that I was one of the original members – member #7, “Furry Foot”. (snigger)
If you’d like to visit the official Council of Elrond website, feel free to refer to this link:
I’m not entirely sure if that link works or not. I’ll check it again soon, just to make certain that it’s operational.
Edit: Yep! It still works.
In addition, here is the “Spread the Craziness” website:
spread-the-craziness.tk/s?c=1&i= … 61&f=0&y=0
Holy smokes, I’m still on the list! Ha! That’s hilarious… If you go to the “Members” section of the site you’ll see it…
Foolofatook~ - #7, “Furry Foot”. (chuckle)
Star Trek.com - I was a member here for only a little while, perhaps a week or two at the most. My screen name there is “Spotted”, although I only posted once or twice.
Mugglenet.com - I also attended this site for only a short period of time, given the fact that, for me, the website was simply too popular and crowded for my taste.
Ever Increasing Faith.com - I’m a member of this website, as well, since I’m a Christian and a member of that particular church. You can locate their website via this link: faithdome.org/ 
I think that there might have been one or two other websites that I’m neglecting/forgetting to mention, but that’s pretty much the majority of the list. (heh)
– Mitch
Wow Mitch, that is more than what I visit. 
man…how long do you last on those things…
Wow… I’m only on this one. 
I was a member on quite a few, as i said. I ran away from the supressive dictatorship of facepunch, and came here.
Really now. Join the club Pixar.rocks. This is the forum that I visit most frequently now.
Heheh, good to have someone else like me here! 
The Star Swordsman - Ha-ha! Yeah, my list is a bit extensive, I suppose. (snigger)
Al-Bob - Ha! Well, I was a member of the Guide Posts for Teens website for about three years or so, I believe: I’m still a member of the Council of Elrond site after four years; I’ve been a member of Mugglenet for a few years now, as well; and, of course, I’ve participated in Pixar Planet activities and conversed on its forum board since… 2006, if I’m not much mistaken.
I forgot to mention that I’m also a member of the ever popular deviantArt and Blogger websites.
– Mitch
Mitch-Wow…i don’t even have that many…
Let’s see…
I was once an avid a fan of the Digital Monster anime (not so much now), but I am still roaming around the RPG forum of “The Digital Dive forums” daily. I do not visit the other forums there very frequently - or sometimes, barely click on them at all, though.
Then, there is the community board pertaining to my other interest, Detective Conan, the DCTP (Detective Conan Translation Project) Forum, originated from their DCTP website. They are one of the best, if not the best DC subbers in the world and since there are not much Detective Conan communities out there (no decent ones, anyway), I am homed there for now, despite my lack of posting there (I only post in the forums containing topics regarding the DC anime; I don’t read the manga now).
Last but not least, here, of course, Pixar Planet forums, where I still could not believe what must be a fan-made Pixar community could be made official. It’s nice and comfy, and I could still browse the other message boards I belong to while browsing this one, so I guess it’s not too bad.