Window usually, but the fiance loves aisle. I love the sights outside, she loves the freedom.

There's only been one time, when I've sat window and just couldn't "hold it". It was murphy's law to the fullest - full plane, I was bursting at the seams, at my fullest capacity in years. I had been taking advice to "drink more water". Middle and aisle seat pax were both snoring away. I awoke them with my sincerest apologies, and felt bad when they didn't return to sleep when I settled in again.