Cessna 152s - cheap, easy to fly safely, difficult to fly well, so the perfect trainer. Can spin. Robin HR200/120s - similar operating costs, a dream to fly, just handle like a real aeroplane, stick, good view. Can't spin though.
I like the DR400, but have only flown the Regent which is too expensive.I find it a little heavy on the stick and complicated to operate (who threw the switches at the panel?) and needs 3 hands to taxi well.