Always! No matter how many flights I take it is still exciting for me.
During the taxiing I am glued to the window while plane spotting. Neat finds are old DC-8 cargo planes or 727s.
I also like to watch the flaps retract/extend and see the alierons move while positioning. You'll see the pilots adding flap during the decent.
During landing I am again glued to the window.
How could sitting in a chair 35,000 feet above the Earth while being propelled at 500+ mph ever become boring? @:-)
Since time began, humankind has lusted after flight. Now we have it at hand with the push of a few buttons and moving a lever or two.