Jane Austen, I can't explain exactly why, maybe it's because I like to pretend that life was somehow easier back then .... which it's not, I know.
Heinlein, but his earlier, not so oversexed later works.
Asimov
Ray Bradbury
Gee ... this is hard to do. Most of the reasons I like these authors are difficult to state, either because they are so personal, and I can't imagine anyone being interested in those reasons, or because they've been said somewhere else much better than I could say them.
Maybe if my favorite authors were a little more obscure ....