During my last trip from HK to Mel, business class, travelling on my own in a window seat, I had a tall 40ish male passenger next to me. On take off he immediatley stretched out full length to read a book, shoes off, one in his shoe possy and one in mine! He ate quickly and resumed his position. After dinner I needed to go to the bathroom and excused myself to him. He didn't budge, I had to climb over the top of him (being a short, middle aged lady, not a pretty sight and quite an embarassing position to be in) same thing on my return.
He then fell asleep with his light on, leaning his shoulder against the controls. After waiting quite a long time for him to move, I finally needed to call the flight attendant who switched it off from the main control area.
In the morning, this randy, pyjama clad fellow stood in the aisle to do his backstretch excercises in full view of everyone.
This may have been the most embarassing flight I have had in my many years of airplane travel