The definitive book series about the Georgian Navy in the Napoleonic Wars (1803 - 1815) are the 16 novels (and one short story) of the "Horatio Hornblower" series.
When Patrick O'Brian decided to write the Jack Aubry novels (starting with "Master and Commander" first published in 1969) he knew they would be compared with Hornblower books that were incredibly popular.
He decided to make Jack Aubrey the exact opposite a character from Hornblower. While Hornblower was tall, thin, and dark haired. Aubrey was blonde, short, and a bit overweight. Hornblower was always serious, was very closed mouthed, and not particularly friendly (although his men loved him). Aubrey is quite talkative, loves a good joke and loves a party.
The one area where completely differ is their attitude towards music. Aubrey loves music and is an enthusiastic, if not accomplished, musician. The first time he meets his close friend Stephen Maturin in the book "Master and Commander" is at a musical concert in Minorca. The two men actually get into an argument over Aubrey getting carried away and beating his foot to the music just slightly off the beat. Hornblower, on the hand, hated music and admitted he was completely tone deaf.