I don’t know if people like him or not but I find all of John Ham’s performances to be really similar. Even when playing a villain in Baby Driver he sucked, no one believes this milquetoast man who’s delivering a completely flat performance is some bad ass tough guy, granted all the “villains” except spacey were absolutely terrible and cliche in an otherwise fun and good movie.
He’s just really boring, really flat, he’s never made me feel or think anything he’s always “John Ham” regardless of the role he’s in
I don't necessarily buy him as a serious actor. Mad Men was so well written that I think almost anyone could have been an effective Don Draper. My opinion is that he pulled off about 90% of that role based on his looks. (I think it worked overall because there were so many very talented actors surrounding him.)
That said, I love him as a comedic actor. His SNL appearances are delightful, and I'm always pleasantly surprised when he shows up in comedy shows and films.