I usually like the aisle toward the back. However, I would have liked to have had a window seat today coming into La Gaurdia. The ass in the window seat was the only one with his shade down as we descended into NY. He opened just in time to see the crappy industrial part of Queens and causing me to miss the beautiful view of the Statue of Liberty and Manhattan. Really dude? That's like un-American. Everyone was looking out and I couldn't see shit.
Aisle or window. Aisle for the legroom, window for the view. If it's a longer flight, definitely aisle. Front or back doesn't matter, I tend to not be able to get out that fast after being stuffed into a small space