A couple of years ago I was booking a (solo) ticket, and the agent asked if wanted "window, aisle, or middle"...

I asked him if anybody had ever asked for "middle", and he laughed and said no. Since then, I've noticed that the agents I've dealt with have never asked if I wanted a middle seat (if there's nothing left but middles, they obviously don't ask, they just say that).

BTW, I'm a view-from-the-air addict, so for me it's window whenever possible (and I get really bummed when I get the window seat with no window...). Some of the things you see from airplane windows are just astounding -- beautiful beaches and volcanoes in Hawaii, the majesty of the Canadian Rockies and the icy fjords of Greenland on LHR->LAX, ships waiting for their turn at the entrance to the Panama canal, Yosemite, the SF-Golden Gate flight path in/out of SFO... Of course, there's also hours and hours of the Pacific and the Atlantic as well . It tends to keep the wonder of air travel alive for me (and it is a really amazing thing).

Dan