Looking for a tube site with decent quality and length clips? My X Vids is one thats worth bookmarking. The homepage loads with recent XXX Videos and you'll see that the majority of these are over 15 minutes long. Click on a thumbnail and after you've closed an advert you can watch the movie for free in a decent sized player.
Categories lets you narrow down your viewing even more and there are literally hundreds of options to choose from. From Babe, BDSM and Cumshot, you can choose any of these and they display the number of movies available in that category.
If it's photos you are after, these are available too, however most of these are user submitted and more amateur looking. There is advertising on this site, but it's worth ignoring if you can, as the variety here is immense!