Leisure? Happiness? Aurelius, the emperor, was always on the move with his army trying to preserve his empire and worried about his conniving son, Commodus. Beethoven was a reclusive single man, who grew ill and deaf in later years. Schopenhauer was a self-absorbed and misogynistic single man (though he supposedly enjoyed walking his poodles). Nietzsche was a precocious and convalescent single man. Why not add Wittgenstein to the list? Selection bias?