Ktoot, I have the 23' Venture with the liner and I love it. I don't see it mentioned on this thread that blankets, pillows and sleeping bags that happen to be next to the hull in the V-berth don't get wet from condensation. And I don't have morning cabin sweat to wipe down. I think the liner yields a finished look that's also easy to clean and just might make my boat a little quieter and warmer. My boat's kept indoors, but if it wasn't I'd be more concerned about the possibility of mold. But NMI has added liners to their Sea Sports for years and said they've worked out very well.
I had a 16' Angler for a spell and also loved the liner-free look, so I can certainly see why guys feel that way. After all, that's a classic C-Dory look. I didn't used to be a liner guy; thought it was too Ranger-like. But now spoiled with a liner, I wouldn't go back. Know, too, that the V-berth and cockpit are subtly but appreciably larger in the 23'. Owned three years next week, 40 trips, 513 hours, it's a darn fine boat.