Yes, I was leaning towards Piquet, I think he was on equal of Prost and Senna in the 80's - his style was a cross between Prost's and Senna's, IMO. Keke was just a steady driver that didn't DNF much, nothing spectacular, he didn't do much before or after his WDC year. By the same token, you ask Mario Andretti, and his idols were Farina and Ascari (and Nuvolari), but they are all Italian, and Mario saw them race. I doubt most of us did, so we can't relate.
...LOL...and as I voted: MY favorite driver is Mansell. The best driver ever: well, that would have to be Michael but he is certainly not my favorite by a long shot. So sure, Senna for you and others. No problem. Just don't like the constant :"Senna could have accomplished..." answers