Hey Highliner,
We use our boats year round but the reason we like the style we have applies equally as well to summer as to winter use. We prefer the Lifetimer/Silver Streak style boats with a covered bow, full height front windshield, side glass and a soft top canopy.
The covered bow is a must-have for me in an ocean boat. It's not uncommon that we bury the bow of our boat, even in summer storms, never mind the winter. With this style of boat the water goes over the bow, runs up the front windshield and is shed to the sides as opposed to you getting a boatfull. The covered bow also gives us lot's of secure storage space which can be a bit of a problem with a CC.
We like the full windshield as even in the summer on a long run it's nice to be out of the wind and rain. With the seating set up right and small soft top you can keep four out of the weather easily on an 18-20'. I prefer the full height windshield with a higher seat position rather than the low glass with the low seat position as it gives me better vis in front of the boat which is a must with the amount of wood floating in the water around our area.
I like a soft top as when I'm fishing alone I can lower the soft top so I can sit in the captains chair and steer while playing the fish. I have pedestal seats that can swivel 360 so I can sit backwards and still adjust the steering. With a hard top you sometimes have to lower the rod tip too much to get to the wheel which with a big fish and barbless hooks is often an end-game scenario.
I'm also a big fan of hydraulic steering as I can go longer without having to adjust the steering when it's windy or I'm trolling into the current. On anything under 18-20' hyrdaulics are not perfect as by shifting your weight from one side of the boat to the other the keel itself acts as a rudder and turns the boat slightly (like in a kayak) but if you watch your position in the boat you can go for quite a while without adjustments.
I guess I'm just getting too old for the exposure of CC boats... I like my creature comforts
Now if I could just find a small Latte machine that could run on DC.....