Virtually all my experience with autoloaders is with hammer-fireds, and most of them have had the hammers exposed and accessible. All of my guns that have done regular carry duty have hammers. My one striker-fired purchased for potential carry, a Taurus G2C, hasn't been tried out yet, despite my having gotten it maybe almost two years ago.
So, due to that familiarity, I prefer a hammer-fired auto. However, I really don't consider them to be "safer" in my hands than a properly-handled striker-fired would be.