Interesting Thread.
Boat #1 appears to be an economy level boat. Hull is rather simple with few features. Sharp entry may provide a smooth head sea ride. Transom is very flat and shallow (low deadrise), indicating poor ride in following sea and difficulty steering a straight course. Shafts and rudders indicate gas engines, limited power and speed.
Boat #2 is another unsophisticated hull, but older with a real keel, which will help tracking a straight course. The shallow, low deadrise transom may be a problem in following seas. Engines are gas (check the small exhausts), but nicely spaced (separated) which should provide good turning at the dock - if you can get that keel to move.
Boat #3 - well, I don't do sailboats, but that is a pretty big propeller for a sailboat. Must be a long range cruiser.
Boat #5 (John C) has more detail on a nice bow entry. The rear end is surprisingly plain with no steps to prevent rocking at anchor. The props are nicely clear of the hull and separated, so should provide nice results cruising or at the docks.
Boat #6 shows more detail of a sophisticated bow.
Navman's butt has the first rear detail we've seen here. The small, almost primordial steps are at least there to help stop the roll. Big 4-blade props are probably diesel.
Abalmuth's boat - Despite the detail on the bow this has to be a pounder. It just doesn't have the depth up front. I've never seen a step-out on a bow like this one above the waterline. This helps somewhat to control spray, and to keep the bow above water if it starts to head down into a wave. But, all that step surface will slow the boat noticeably - as if you ran into something. (My prediction anyway). At the other end we find two features designed to compensate for limited width and lack of real depth inside: the tunnel drives, which bring the propellers up to the engines, and the narrowly spaced propeller shafts. The price is difficulty trying to make this boat turn around the docks.
