The Thor: The Dark World actor told Metro that he "loved" the US sci-fi series "because it is entirely about character".
"You have villains and some space," he said. "But it's basically a brilliantly written love triangle between Kirk, Spock and Bones - lieutenant Uhura being the 'beard' from what I could see."
However, the Doctor Who veteran did not express any strong desire to appear in the current Star Trek film franchise.
"The original Star Trek series was important to me," he continued. "But I wouldn't whore for it."
Back in August, Eccleston spoke of his "love" for Doctor Who as part of a BFI event celebrating the programme's 50th anniversary.
In April, the BBC denied rumours that Eccleston had pulled out of the upcoming 50th special, stating that he had never signed up to take part in the first place.
An official source said: "Chris met with Steven Moffat a couple of times to talk about Steven's plans for the Doctor Who 50th anniversary episode.
"After careful thought, Chris decided not to be in the episode. He wishes the team all the best."
> Star Trek: Should it boldly return to TV or stay at the cinema?
Watch Christopher Eccleston talk Thor: The Dark World with Digital Spy below: