Can you name me some of the best forum which you actively involved

MacRumors is a good place for Mac help (I'm a Mac user, so being active there has really helped in the past). Not like it was a few years ago, but still very helpful.

WF I used to lurk under another username (yes, I know) - I lost the account name, password, and have no access to email addresses I used years ago. It's been useful over the years.

PhotoshopForums Solid community for Photoshop and design things; Being as I used Photoshop weekly it's really helped out.

-DigitalPoint- Used to be active. It's become a joke - half of all responses are in broken English with the same gibberish over and over.. "Make page rank site by have strong links!" or something similar... I did good selling some blog posts and backlinks on there, but then the brain who runs it started charging $25 a month for access to those forums under the pretense of stopping spam, but it didn't (compared to $20 here, $29 for Source Wave, etc). I left because every time I posted I'd get a bunch of spam PMs, which only got worse after the price tag went up on those sub forums. He said he basically didn't want the sales threads anyway and didn't care if they dried up; heck of a way to run a community..