I really liked Epictetus' Discourses. He has a very sort of no-nonsense Dr House vibe going with his bum leg and constant criticism of his pupils. A lot less full of shit than some other Roman Stoics. Maybe not everyone's jam, but I found the tools it provides for dealing with shitty situations highly useful.
Indeed, I think it's a big mistake to cheap out and go for some impenetrable 19th century translation when reading this type of book. Philosophy is difficult enough without dealing with the ridiculously elaborate and flowery language of older translations.
Modern Oxford World Classics or Penguin Classics translations are significantly more pleasant to deal with.
