I'm really happy looking at my favorite photos on Flickr. So much about that grid of photos appeals to me: the colors, the little thumbnail shape, the thinnest border surrounding each shot, the optical illusion that makes it look like there are grey squares at each intersection. You can't add your own photos to your favorites, so these photos are all taken by either my friends or random people I don't know, found through tags or just by viewing recently uploaded pictures. Pages like this are what makes Flickr so cool. I love looking at these arrays of little pictures.

Related links:
Playing Favorites Flickr group
iPhoto grid poster