It varies for me. Generally I use the '90s cast for the X-Men, but I wrote my X-Men novel with Patrick Stewart's voice in mind for Xavier. And sometimes the later X-Men cartoons have better voices for certain characters -- such as Liam O'Brien's Nightcrawler and Phil LaMarr's Gambit in Wolverine and the X-Men. And sometimes these days I prefer Tom Kenny's creepy and soft-spoken Doc Ock from Ultimate Spider-Man to Efrem Zimbalist, Jr.'s bombastic German-accented version from the '90s show, since it better fits how the character tends to be written these days in the comics.
But Roscoe Lee Browne is the Kingpin for me, period. It doesn't matter if he's written differently than in the cartoon, since Browne was a very versatile actor. And there haven't been that many other Kingpins onscreen, have there? He had a couple of one-time appearances in the early Spidey cartoons, played by Tom Harvey and Walker Edmiston respectively. In the '82 cartoon, he was played by Stan Jones, aka Superfriends' Lex Luthor, which is definitely typecasting. There was John Rhys-Davies in The Trial of the Incredible Hulk, though he had hair and was never called Kingpin. Then there's Michael Clarke Duncan, in both the DD movie and the 2000 CGI Spidey cartoon. And now there's D'Onofrio. Really not that many to choose from. And Browne played the role longer and more extensively than any of the others to date.
Apparently there have been a lot of Kingpins in video games, though: David Sobolov (currently playing Drax in Marvel cartoons), Stephen Stanton (currently Grand Moff Tarkin on Rebels), Bob Joles, Gregg Berger (Mysterio/Kraven from the '90s Spidey), Travis Willingham (the current animated Thor), Jim Cummings, John DiMaggio, JB Blanc (recently Alfred on Beware the Batman).