R. Star wrote:
I'd say early Bashir annoyed me a lot. But by season 3 or 4, they'd made an active effort to make him less insufferable and though that major plot twist concerning him is really out there, it suited him in the end. Though Ezri did annoy me too... but for spoilers I won't get into that. Let's just say she distracted from the main plot more often than contributing to it.
As for Nog, Captain Kathryn. I'd actually say he probably had the best character arc out of -everyone- on DS9. He's a petty Ferengi brat at first but he changes... a lot. If you watched the season 7 finale of DS9 you seriously wouldn't recognize him, but the slow changes over the years really do become him.
I really hated Bashir's twist. They turned him into a gimmick character, and it made no retroactive sense. They also introduced a class of people with no basic human rights into the Federation and it led to some of the most annoying characters in the series.
The three crazy genetics were some of the most obnoxiously over the top characters in the series and it made no sense that they were not executed for high treason.