For Full movies, videos, picture megathreads, etc:
http://www.pornbb.org
Mostly Rapidshare, hotfile, fileserve, etc links, use Jdownloader (google search) for batch downloading...
For torrents,
http://www.kickasstorrents.com/xxx/
^^ The torrent sites has Image previews as well as info, so you can check the video screenshots before downloading. No registration required, all free downloads... (use utorrent for downloads,
www.utorrent.com )