Profoundly Unlikeable People
Vincent Chase - Far too bland and forgettable to convince as a movie star. He just has to fart and women want him for some reason.
Eric Murphy - Perhaps the least likeable character of all of them by far (the irony being that he's clearly supposed to be the most likeable -- the heart of the show -- but he's just deeply unappealing).
Johnny Drama - Occasionally ridiculous but essentially quite likeable due to his innate dopiness.
Turtle - Probably the most likeable.
Ari Gold - The character that actually makes this show work. Always fun, entertaining and sympathetic even when he's being a dick.