Why do people keep saying this sort of thing about Jason Isaacs, as if Star Trek isn't good enough for him or something? I mean, he's certainly a talented and charismatic actor, and (glancing at his IMDB page), he's a reasonably busy one... but it's not as if he's busy with A-list roles. He does voice work, he does TV series, he does supporting roles in assorted second-tier movies... he's not doing high-profile tentpoles or prestigious Oscar fodder. Why would he not want a lead role in an ongoing big-budget TV series, if it were offered?