I flew a TB9 regularly shortly after getting my PPL. Loved it to bits. Now fly PA28's all the time, but still look longingly back at the TB9.
Is is a lot more room in the TB series than a PA28. I believe all the TB series share the same cabin. The cockpit layout, while maybe French, is an order of decades newer in design.
It also LOOKS like a great airplane.
But I suppose at the end of the day, if everyone agreed on aircraft, then there would only be one type sold. If everyone agreed Ford Mondeo's were the best in the class, then there would be no Primera nor Avensis's sold. It all comes down to individual tastes and priorities.
dp