Coolness AND attractiveness factors, ok; but back to the substance that convinced me I wanted to date him before I even saw his picture. He's applied his general network analysis algorithms to analysing wide ranging network data, from biological pathways to animal behavior to routes in cities to physics paper citations to web site linkage. The papers tend towards the math-full, but the points are pretty interesting nonetheless. And his math gives me hope I can crunch my enormous pile of LiveJournal network data into something tractable, eventually!
On his pubs list, look for the "Why social networks are different from other types of networks", "Finding community structure in very large networks" (in which they analyse Amazon.com buying patterns and find community-like structures), and the sweetest one, "Identifying the role that individual animals play in their social network," a study of dolphin communities.
Apparently one individual (SN100) acts as the broker between 2 dolphin groups. (Other dolphins had names like "fish" and "thumper"; so why couldn't SN100 get a real handle?) Dolphins hang with other similar dolphins, just like people do. Here, I'll make it easy to get to the dolphin story.