The-Bone asked about salt vs fresh water time spent.
I only have fresh water experience on the west coast and salt water hunting on both coast. From my fresh water experience, unless a place has been worked and cleaned prior, I found that the fresh water hunting in a lot of places can be a hard effort. You have to work at clearing out a lot of 'junk' to find some goodies. (tree limbs, cans, pull tabs, ect) Once you have pretty well hunted it to death, usually for a few decent pieces, then you have to wait for the next year for it to be replenished by the crowd. Once it's gone, it's gone for the season. Of course, I wasn't in a real warm sunny swimming kind of place all the time being along the northwest coastal areas, so most places were somewhat primitive and were tough to hunt. I had it much easier when hunting more populated areas inland and the time/junk/ticket ratio was much better. I did very well inland where there was more sun and a lot bigger population, but there was usually still plenty of junk to deal with as well as competition with other hunters and it was up and down the scale. The best I did for a while was getting under the water with a friend of mine. I lucked out when he showed me the results he was getting from his shallow water diving and it wasn't hard to talk me into being his dive partner. Still had a lot of junk, but not as much competition in the deeper water. Too bad I had to move to the coast because things were really getting interesting and we were loading up on some nice stuff.
With ocean beach hunting, things can change daily. As long as there is any kind of wind or tidal action in your favor you can always find targets. The ocean is like a big giant gold pan, separating the light stuff from the heavy stuff. Where as you can hunt out a fresh water area that has no tidal action to sort and separate the light from the heavy and replenish it'self, and once the place has been hunted out then you have to move on to other places and wait until next year to hunt that spot again. Overall, fresh water time/junk/ticket ratio didn't average out as well for me as do salt water beaches in the shallow water. Maybe it really depends where you are, how sunny, how big of crowd and what the competition is like.
I like the salt water beach hunting better as it seems to me to be less work per prize and it is constantly replenishing it'self even when there isn't a crowd. It is a pleasant place to play.