I don't really have a preference on mechanical vs quartz, though loud automatics do bother me. I like something in the 44-46mm range, especially if it has a bezel, because I like larger, clearly visible numbers on the face. For those reasons, I really love the tool like look of some watches, like the Marathon SAR's and my DB Day/Night. Tritium is awesome, too.

I'd really like to get a type B face Nav-B watch... if I ever get another watch.