Your core numbers show a mixture of the superficial, easy-going attitude of your 3 Heart's Desire, and a decidedly philosophical/spiritual 7 Personality. Even with the driven, ambitious 1 Expression, this 3 and 7 combination may challenge you to maintain focus and direction; your attention likely wanders when something new attracts your attention. 

The different aspects of your personality can also unsettle people when they first meet you. You may switch from introvert to extrovert, from deep thinker to light-hearted joker, from serious to sunny - and often without warning. Your sense of humor is offbeat too.

Your 3 Heart's Desire is about imagination and a desire to express it. You probably spend quite a bit of time daydreaming. This contrasts with your 7 Personality, which thrives on pure intellect and the search for the obscure and hidden side of life. The combination of the 3 and 7 suggests you might mature slowly (due to your inquisitive and creative nature) but you will gather impressive insights along the way. Your attempts to understand the intangible realm may cause you to ask awkward questions. As you reach adulthood, you will likely question the status quo and express unconventional views.  

Your 1 Expression number will likely push you to freelance or become an entrepreneur. Your challenge is finding an outlet for your uncommon range of talents, the result of the vastly different 3 and 7 in your core-name numbers. You are better suited to work for yourself than for others, due to your unconventional way of thinking and your individualism. Additionally, your opinionated, sometimes confrontational approach could get in the way of being an effective team player.
 
Similarly, in your personal life, you could find yourself a bit of an outsider, even within your own family and community. You will likely partner with a person who stands out in some way, and doesn't always fit in.

Now let's look at each of your core numbers individually.