Interview with Alexander Siddig: http://www.avclub.com/article/alexander-siddig-being-bashir-quitting-24-and-gett-222045?utm_medium=RSS&utm_campaign=feeds
On the Bashir enhancements storyline:
[quote]AVC: How did you feel about the whole “enhancements” story aspect?
AS: Oh, well, I felt a little fucked over with that. [Laughs.] I thought that was a bit cynical. I got the sense that, by the end of the run, there were other Star Trek shows that were coming out which were more popular, pulling ahead of us. Deep Space Nine, you have to understand, in its time was not performing as well as the studio wanted it to or needed it to. And that was down to the fact that it was built on what was, at the time, a very wobbly foundation of long character arcs. These weren’t shows that were over in one episode and moved on to the next planet, dealt with that, and moved on again. These things went on forever, and people had to tune in again and again and again to find out what happened to these characters. That was unheard of at the time. And I think that now, because it’s more fashionable, Deep Space Nine has become a lot more popular and a lot more interesting to a lot more people.
So when that thing came along about enhancing me, I felt they were really trying—cynically—to make me more like Data, so that I would be more popular still, and I felt betrayed. It wasn’t part of our plan! So I just ignored it. And whenever the lines came up, I just screwed them up. It wasn’t that I didn’t deliver them, but the lines that referred to that, I just messed up. The actor has that power. At the end of the day, they have a veto, and that veto is expressed in just making the line rubbish, just losing it. So I’d say the line, because that’s my job and I’m paid to do that, but I said it in a way that hopefully it drifted off and no one really noticed it.[/quote]