The last Carnival ship I was on was the Celebration - back in the late 80's. The newer ships are different. But I do remember the cabin size was nice. The pool, casino, and disco were always going strong. This was a party cruise!
On the Dawn, you will have a gorgeous ship. We just came back in September. Lots of dining choices - and no set time. That would make the difference for me! Loved the stadium seating around the main pool area. The lounge in the front is gorgeous for views. If you like to go to the gym, they have new and varied equipment. Overall a good time. I think it was just about the right size!