1) It should work like a bottom timer, not just a time keeper. In other words, it should time AND depth. This is the main reason I don't use a dive watch outside of the swimming pool now.
2) It should start accumulating dive time automatically upon submersion to to given depth (1m?) and stop accumulating dive time 5 or 10 min after the dive is over. Yes. Without these two features (1 & 2), it's really only good for timing lunch and swimming laps; in other words, not a diving tool.
3) I like *simple* analog faces but the bottom dive time and depth could be displayed digitally if it were done discretely. Digital, by definition, is discrete (discontinuous). You mean discreet.
Digital is also ugly, in my opinion. If you're watch isn't better looking than a D9, why bother?
4) In terms of appearance it should have a sleek simple design that you can wear at work (I work in business) without people thinking that you just walked off the set of robo-cop. This is my main objection to most of the citizen designs. Yes, well said. While a little bit casual for classic business attire, the Submariner meets this requirement nicely, especially in today's more casual environment. Most days I wear mine, even with a suit.
5) the glass face should have a concave form inset under the line of the bezel so that it doesn't get scratched while diving. Nice idea, but a sapphire crystal is pretty scratch-proof.
8) The face should be clearly readable if you shine a light on it. To me it doesn't matter if it has a back-light or phosphorescent bits that are hard to read anyway. Readable, yes. The date on my Submariner is illegible to me, even with the little magnifying bubble. The date on my Tag Heuer dive watch is also illegible to me. That's not the watches' faults, it's my failing eyes. But if you want to price a watch in the $1K to $5K range (theoretically) it better work for the 50+ set. So, for me, that means a large face.