Daytona kid,
I certainly did not mean all delta airplanes, I've flown Rafales and mirage's, they fly much better than Roo's and Rookie's etc. All the Roo type birds I've flown tend to tuck the nose in turns, they don't roll perfectly axial, they are IMO a little trickier to land, they don't like to "stick" to the ground as easy as a conventional jet.
When I say a "true" airplane, I mean they don't fly as accurately as a conventional layout, when you go inverted they typically need more down elevator, when you roll there is some wobble from coupling, etc.

There's nothing wrong with them, I just personally don't care for the flying characteristics that much.

Oh, the first airplane flown wasn't truly tail-less it has vertical fins and a canard type set up that's still a type of tail, it was more like Fuselage less