"Most people I know enjoy some sort of mystery stories. My mother-in-law loved police and courtroom procedurals. My mother likes detective fiction. There are also murder mysteries, general mysteries, and hard-boiled detective stories, with protagonists such as Sherlock Holmes, Sam Spade, Amelia Peabody, Kinsey Millhone, Mamur Zapt, and Perry Mason to name a few."
Amateur detectives. I like the cosy type (Aunt Dimity by Nancy Atherton for example) and the old-fashioned type (Miss Marple!). I'll also happily read police mysteries (PD James is a favourite), but I'm not so keen on medical or forensic ones, or PIs.
I'd rather have a really puzzling mystery than blood and guts. There's enough of that in the world - I read to get away from reality.
I often go for mysteries set around the early part of the 20th century. Agatha Christie, Margery Allingham, MM Kaye, and Elizabeth Peters are all favourites. Some were writing then and some are modern authors. I like authors writing in the here and now too - anything from the 1980s onwards. I've tried quite a few of the roman/medieval times mysteries and never got into them for some reason. Odd, as I love history.
Most lands are distant now I live in NZ!! (Although Ngaio Marsh did write a few mysteries set here.) I don't mind too much - it's the writing that counts - although Elizabeth Peters' books are mostly Egypt, which is great for an ancient history fan, and the Agatha Christie's that are set abroad are favourites. I do love little English village murders though - a little English village was home for 19 years.
Sometimes I try to figure it out, but usually I just read. I never skip to the end to see whodunnit!