I've been reading Bertrand Russell's A History of Western Philosophy, and I just finished the chapters of Hellenistic philosophies. Of those discussed, Stoicism seemed the least appealing. I frankly don't see the value in optimizing for some ill-defined "virtue". It seemed like a heuristic for finding utility rendered into a goal unto itself.

That could of course just be Russell's positivist bias speaking through, of course. I really ought to read some of the actual sources sometime.