I prefer my deckover gooseneck as it offers a broad, obstruction free surface to haul whatever suits my fancy. There are no fenders to bend, or get in the way when you go to tie down. Round bales are a perfect example.....
I don't find the height a problem. You need to be just as careful with your load 12" above ground as you do with it 30" above with regard to CG. Also, anything that you need a forklift to load on a deckover, you'll need a forklift to load on a lowboy.
Another consideration is dovetail ramps vs. a solid dovetail ramp vs. a tilt-deck, or a straight flat deck with detachable ramps. Lot's of different options....
Deck-on-neck is a nice option too for added storage space.
My sled trailer is also a deckover style, which is fantastic on the inside, but not as nice in terms of external cosmetics as a cargo or car-hauler would be. You need a deckover if you want to load sleds or quads side by side.
-Jer.