I work in a warehouse and nicer mechanical or even quartz with a crystal would get scratched up pretty quickly, so digital is really my only realistic daily driver option. I really like the G-Shock 5610. It's basically the classic Casio F91W on steroids. Solar powered, so I never need to worry about a battery change and you can radio sync it with the atomic clock so accuracy is never an issue. It's also a lot smaller than most of the other G-Shocks so I don't find myself catching it on things as I work. Price isn't bad either.