I prefer O' Brian's Aubrey/Maturin to Forester's Hornblower even though I have only read about half of the Aubrey books
and have read the Hornblower series at least twice.
The Hornblower TV series from A&E, when A&E really was Arts and Entertainment, was excellent and a real shame they did not make more episodes.
Never read the Sharps books
but did see a few of the movies/TV shows and it was pretty good. Need to see if we can stream that series...
Having said that, if you really want to read adventure stories go read history
. O' Brian's stories weave his characters into actual historical events
. Many of the characters in his stories, and I believe this is true with Forester, where real people who did deeds that were/are unbelievable. I read a book on British naval leaders during the Napoleonic wars and you could see where O' Brian got some of his characters and battles. What these guys did was unreal.
is full of people who have done amazing things, that if written as fiction, would not be believed. And mostly what they have done goes pretty much unknown to most people.