Foxmoth
Not so, IMHO an ideal training aircraft is not necesarily an aircraft that is particularly easy to fly!
Although I think you misunderstand Rogcal's comment, you do nail the issue bang on.
That's why I think that the C152 and the Pup are good tutors, they need to be flown accurately and that breeds good habits, whereas the PA28s I did a lot of my training on were rather less challenging and it was a good job that my instructor compensated by demanding perfection in areas such as trimming.