Terrible luck then. I always advise that people stay away from marques that they've had problems with as the human mind never really gets over it! Thats why I'll NEVER buy another Citroen, BMW or Audi!
However, of the Renaults I've owned or driven, none were terrible, and one was actually very good, surprisingly so although one really tested tested my patience!
I've owned a lot of cars, when I find my cup it will be car number 51, hopefully it will be memorable for the right reasons, I'm sure it will be from the feedback I keep getting about them.