Observing people around me aka, "people watching", be they in life or on screen, is a fascinating exercise and has helped me to create my "quirks and mannerisms" for bringing life to my characters.
Much to my family's chagrin, I will find myself mumbling a line under my breath to copy the intonation and prosody, and imprint it to memory for when I create said "friends".
The musicality of language is interesting to me, not only in the way we inflect but the physicality involved in producing words, far beyond simply the end result of sound.
Many of the UK dialects lend softness and an element of familiarity, which enhances the feel-good factor of trusting from whom you are buying. Studies have proven that particular dialects are used for targeting specific markets because of the trust and confidence it engenders.
When I read any story for work or pleasure, I immediately assign an accent or voice to a given character.
There are some accents that I have gravitated towards and over the years have become my solid favorites.