For me, I need my hair long. Right now it is past the middle of my back pretty close to my butt. I haven't trimmed more than about a quarter inch off in the past 5 years. I just can't bring myself to cut it, because I look really awkward with even semi-short hair lol
I think either short or longer hair can look great on women, just kind of depends on the style you have going on. For me it would absolutely not be a deal-breaker to have a woman with short (or long) hair. My partner's hair has ranged from reasonably long to pretty short and I think it looked great both ways, but she tends to prefer the shorter hair now (both for ease of care and because she finds it more flattering).
To me, it depends on the woman. Some women look fantastic with short hair, and some look fantastic with long hair. Hairstyle wouldn't be a deal breaker for me on anyone. Hair is always changing; style, color, etc.