Douglas Reeman (writing as Alexander Kent) wrote an excellent series about a chap named Bolitho. I love them as much as I love the others, they're certainly as good as the hornblowers.
Reeman's WW2 writing is also very very good, though I don't think there is a series quite like Hornblower or Bolitho. Every book is a different ship, a different crew, but it's much the same style.
Sci-fi... You might like Elizabeth Moon. The Serrano legacy is good, and Vatta's war despite being about traders is very good, and has more space warfare...
Thanks, I'd read a few of Reeman's WW2 books, but I hadn't heard of the Bolitho ones, so I will give those a try. Serrano Legacy is good I agree, but again I haven't read Vatta's war so I will give that a try. Thanks again.