I am envious. I don't want to wait but I shall.

O'Brian's stuff is too much like popcorn. His books were more like chapters. It was frustrating to have to wait a year between volumes.
Don't detract from Forester, though. The 'Captain Hornblowers' were written for the purpose of generating a script and thereby hangs an entire genre. Each of his novels is a distinct book and stands by itself. The O'Brians don't.

You might also try the Drinkwater series. Much better than the O'Brians. In addition, Woodman allowed his character to die, rather than simply stringing out the series as did O'Brian. If he hadn't died, we would still be waiting on new volumes.