I have not read those except for the Plato dialogues, but that's the first time I've seen someone say Kant is easier to read than Plato or Hume. (Plato and Hume are considered among the best writers in philosophy. Kant is considered among the most obtuse.)

Kant did not do any of those things except drink, as far as I'm aware. He stuck to a relatively austere daily routine, with fixed times for eating/discussing/walking/reading/writing. Recent biographies do claim young Kant was flamboyant.