The last thing of his I saw in sequence was The Fearless Vampire Slayers- the one with Sharon Tate in the bubble-bath. It's Polanski's idea of a romp- self-indulgent, unfunny, really rather tiresome. After that I avoided him.
More recently- because they came my way- I've watched Rosemary's Baby and Macbeth. They didn't make me feel ill- maybe because my powers of resistance are stronger- maybe because Hollywood didn't give him the absolute control he'd had in Europe. I liked Macbeth more than I thought I would, though artistically it's a bit of a mess. Rosemary's Baby was undone for me by the absurdity of its ending. They're schlocky films, both of them, a little silly and immature. It would be nice to think Francesca Annis' nude scene had nothing to do with Hugh Hefner being sat in the producer's chair.
I haven't seen Chinatown. I don't suppose one should come to a final judgement without seeing Chinatown.