other folks here on forum, have more experience than myself, the little amount of use i do remember of dove tails, was when i was a young kid. but loading stuff in back of pickup trucks to a regular smaller trailers different story.
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some stuff may make more sense to you, and your own uses. vs other folks and there uses. to many con's vs pro's, and compromises.
would have issue with un-level ground, how many times are you actually going to arrive some place to load/unload something were you have a nice long flat area to park and load/unload, and get the ramps to set nice.
second issue is overall weight of ramps, and being able to physically fold them up, and/or scoot them over to deal with different widths of tires.
were do you want the rear support legs, so when ya loading something heavy, ya do not lift front of trailer and rear of truck off the ground? on the ramps, or right at the dove tail? can you slide a board under the rear support legs easily and adjust them? so ya not sinking rear supports into soft ground and getting them stuck?
do you have side pockets, for easily inserting some 2x4's with some lumber attached for sides?
do you have easier to use locations for latching chains / chain binders?
if ya loading up say a tractor with a FEL (front end loader) on it, plus a 3pt hitch rotatory cutter on the tractor. will the ramps fold up?
if ramps are directly attached to rear of trailer, how much interference will they cause, if you need to use longer boards? or shorter boards / ramps, if backed up into a hill side or ditch for loading / unloading.
i am not a large fan of ramps or rear tail gate that stick up into the air, even a front header on a trailer. a lot of extra wind resistance happens. = more fuel / lower driving speed. it may not be bad only using trailer a couple times a year... but longer trips, etc... and it eats up the fuel.
license plate, and tail lights... how much of that stuff is actually protected? have bent up a lot of licenses plates, and had to buy new rear end lights. due to either bottoming out / dragging.
is the wiring for the lights... do all lights have a direct ground wire to frame (to save money), or an actual ground wire that is ran to each light? are the wires inside a frame or pipe on the bottom side of the trailer? and were the wires exit frame/pipe, can the wires be easily snagged by tall weeds? ((have had many ground issues, and easier to just run ground wire to all lights vs going through frame, also have had a few weeds / tree limbs snag wiring and destroy the wiring. not tearing it completely out, but pulling wire apart back inside the frame (not easily accessible for repair.)
cleaning the mud off... along with driving something up on the trailer, in wet muddy conditions... and slipping / sliding all over the place. and or a wheel wanting to slide off side of ramps.
if it comes with spare tires and a spot for them? were are they located and mounted? under trailer? up on the tongue / front of trailer some place? or just some spares seating back at the house/shed?
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are you upgrading to say a goose neck trailer? vs a BP (bumper pull) trailer?
are you needing any sort of tool box (like in back of a pickup truck) on the trailer?
are you needing an electrical 12v winch, to help pull stuff up onto trailer? car / truck / tractor that is not starting and hauling back home to fix it or to a repair shop to get it fixed? or simply dragging scrap/junk up onto trailer?
does your break control allow easier adjusting of trailer brakes? so you can adjust delay / strength easily from inside the truck, pending on type of load you have on the trailer?
do you need to upgrade truck wiring and plug on rear of truck to support... side marking lights, or 12v winch, or like?
