Reddit.

You finally got me to check it out.
I found some pretty cool shit on reddit/battlefield3, however you abbreviate it.

I wanna find more gifs, which page should I browse?

http://i.minus.com/ibicsRE4ITJvc.gif
That's how you say "FUCK YOU!!!" where I come from.

/r/subredditname

/r/battlefield3

Because the link is www.reddit.com/r/battlefield3

There are a lot of obscure subreddits that will match anything you are interested in. I like to just type /r/randomthingIthoughtof just to see if it exists. And then it does. And I subscribe to that subreddit. And then reddit gets awesomer.

/r/creepyPMs
/r/ShitRedditSays if you wanna get meta
/r/dota2
/r/anygameyoulikereally
/r/Games more serious than /r/gaming
/r/AbandonedPorn or maybe /r/AbandonPorn, I think the former. And then check out the related subreddits listed on the page.
/r/circlejerk for getting meta also
/r/AdviceAnimals but that may be a default subreddit by now

My favorites:

/r/battlefield3
/r/freehugsbf3
/r/karmacourt
/r/circlejerk
/r/AbandonedPorn
/r/MarijuanaEnthusiasts (It's a subreddit about trees, which is ironic because the subreddit for actual marijuana enthusiasts is /r/trees)