Honest answers.
I really don't like the part-timers, especially the "baby factories." Hmmm, "like" isn't the right word; "resent" - yep, that's it. I resent them because a) if they're on your project team, expect that their work isn't going to get done on time. b) if they're the project leader or manager, expect that you aren't going to get what you need. Once-a-week project meetings now will drag out into once-every-two-weeks, once-a-month, etc.
I particularly resent the bending-over-backwards management *seems* to do in their direction. I think it is discriminatory towards single people and childless people, et al. The worst offenders are the single moms who are righteous about their "situation" and, well, they are perfectly right in expecting that management will give them three months' off and thence three days a week in the office.
(To be fair: Reservist and Guardsmen who are called to duty, engineers put on long-term temporary assignments out-of-the-office, etc. are a different kettle of fish - apples and oranges, etc.)
It's really bad when you have a site visit and they have to come along... Now you're on their schedule and it is damned inconvenient if you need the team to stay an extra half hour on the site or whatever. I try (sometimes I'm successful) not to be involved with any project where a team member is working from home.
Call me sexist, male chauvanist or whatever. But my mom didn't work, she stayed home and raised three kids while my dad worked and kept the roof over our heads, food on the table, etc. My mother has a Ph.D. (though not in engineering), too. Once the kids were all out of the house in once form or another, she went back to work full-time. Is that right or wrong? I don't think we suffered from having mom at home all the time...
Regarding women engineers, as many have echoed here, just like male engineers, there are good and bad. One totally unfair advantage women have over men is that they are allowed to cry. Am I wrong, gentlemen?
I know women engineers (and non-engineers) who've cried their way out of (and into) various situations. If a guy turned on the water works because his hard drive crashed (bad example, it's ok to cry over that...) instead of cursing a blue streak, he'd lose the respect of the entire company. People will stay away from an angry man until he calms down; a crying women gets everyone's sympathy. Huge difference.
As a heterosexual man, I am genetically coded to be sexually attracted to the opposite sex. In a battle of man vs. nature, nature wins. The way to beat temptation is to FLEE IT. I am far more inclined to have a decent, professional relationship with a physically unattractive (and preferably older) female engineer than with a bombshell recent engineering graduate. It's also super intimidating if the "hottie" (sorry, ladies, this is the language men may use in the company of other men) happens to be brilliant. Not only does she have the looks, but she's going to be my boss one day... Or worse, she's going to have kids and be one of those damned part-timers and I'll be stuck on a team with her. The team meetings, with her on the phone, of course, will include how she's doing, what it's like working at home, how taking care of a kid is a full-time job (duh...), etc. And if she doesn't have the hardware and software the rest of us have, we'll just e-mail back and forth.
The ultimate kicker is if she has an affair with one (or more) of my coworkers - or me. And what about the not-as-attractive female coworkers? Boy, you want resentment? You want jealousy? At least the part-timers can stay home and watch the soap opera instead of making their own in the office. Office cat-fights are not fun in the least...
You wanted honesty!