I have never been on a plane so I can't say exactly but I will definitely like to sit by the window.
aisle, no question. First to get out; no need to crush anyone if I need to go to the bathroom.
Window, which works out really well for me because my wife does not like the window seat. This way we never have to fight about it. We just flew to Nevada and I got some awesome pictures of the mountains out the window. When you get above the clouds there isn't much to see, but when it is a clear day the views is fantastic!