Any personality quirks with female Capricorns?

You should ask her, be honest and direct. She'll respect that. Plus the answers you seek she has anyway.

If you're interested in dating a Capricorn girl long-term, you better get your act together because they know exactly what they want in life and are not afraid to work hard to get it. She probably has a well-established career and will happily talk to you about her work. She'll find you more attractive if you also take your career seriously and are aiming to go places in life. She probably has plans and goals for 5, 10, 20 years down the line and will want you to be thoughtful about your future too. Capricorns value stability, so if you're still figuring things out and don't have a vision for yourself, you two probably won't work out.

Like others have said, Capricorn women can be really ambitious and hold themselves to a high standard. When things are going well for her, it's awesome to see her confident and proud of her achievements. But when she falls short of her lofty goals, it can hit her pretty hard. You'll need to be there for her and provide emotional support to reassure her that she is resilient and will overcome this setback just like she has in the past. It hurt me to see my Capricorn girlfriend beat herself up when she's so amazing. The high highs and low lows can be a lot, because Capricorns feel deeply, but I love my girlfriend and wouldn't have it any other way.

Capricorn women are very disciplined. If you’re not the kind of person who can support her goals and respect her discipline, you may find it difficult to have a relationship with her. For example, if she wants to retire early and stick to a budget but you are more loose with your spending, that will create friction. Make sure you get a clear idea of what she has planned for the future before you get in too deep with her, because you will be taken along for the ride.