I'm not interested in women, so it's the character's personality that counts in my opinion. Ro was annoying and not at all charismatic.
I also don't like her face, it's too haggard to be aesthetically pleasing. Her body is too masculine, and I'm not saying that I think she's too thin, because other very slim women strike me as much more pleasing to the eye. Take Jadzia or Ezri... or Kira, who is very athletic and still feminine, not to mention a character I sympathise with. Even Ezri is nice, although she's a bit silly.
Ro, on the other hand.... blegh. Horrible woman. The Maquis thing doesn't help.