if you want a watch to actually fly with.....
glance at the watch for just a second and look away. can you work out what the time was? in bad turbulence a seconds glance may be all you get so a watch face you cant read quickly is useless.
digital number faces are also pretty useless because you can't look at the estimated time enroute on your gps then look at the face and work out what the time will be when you arrive. say you'll be there in 15 minutes. it is quite easy to look at the watch, work out where 90 degrees ahead of the minute hand will be and have your answer.
the lumibrite face on many lorus watches is worth having as well. when you have the aircraft all tucked away in the hangar and you need the tacho hours the lumibrite face will light it up enough to read the figures off.
also any of the battery quartz watches will be 5 times more accurate than a mechanical movement. if they go slow or become erratic just put in a new battery.
pilots who actually use their watches often have the simplest watches.