I have no idea what Catherine is like as a person. She comes over very well, but of course, that's a carefully curated public persona.
But whatever she is like in private she's won my sympathy and admiration over the past few years by her dignified and restrained behaviour in the eye of the storm created by H & M. The horrible personal attacks and slurs (I'd never forgive anyone who slandered me as a racist on a world stage) and, frankly, character assassination as well as the vile SM campaign waged against her even in the light of her illness by their supporters (with no word from H & M to call them off the attack) would have broken many people. She really has exemplifed Michelle Obama's wise counsel that 'when they go low, we go high'.
The walkabout after the Queen's death must have been hell for Catherine (and M too, but I don't feel sorry for her), but she kept it together. I don't know if I could have done that!