I would have to say community, and the universal Church as a whole. I love the sense of community that springs up around our Catholic Faith. I love that no matter where I am, the Church is still the Church. It doesn’t matter if I am in a different city, or state, or even a completely different country, our Faith unites us.
I remember being in Germany and going to church and feeling like I was home. Even though I couldn’t understand the language, the Mass was still the same - the same order, the same feel - and I knew exactly what was going on. Afterwards everyone was so warm and inviting and wanted to talk. Another time was when I was on a pilgrimage to World Youth Day in Poland, then traveling around Europe, we had Mass in an airport terminal. During the Mass we started out with just our group but slowly travelers from all over the world stopped and joined us, and we all had Mass together - it was amazing. Our Catholic face is truly universal and no matter where I go, the Catholic Faith is a constant.