What does it mean to be attracted to someone according to their ascendent?
The ascendent is the way we present ourselves to the world.
All the energy in our chart is funnelled through this point.
So what makes others attractive to you? Usually you pick up on something that relates to something similar inside you. The way they express themselves, speak, laugh, dress.
In your example, you express sagittarian traits, that others pick up on when they meet you or relate to you. If they have something inside them that is similar, which could be their moon, sun, venus, mars, there is a connection and a positive one. Instinct says you have something in common. It's like a mirror reflection.
This can work in the complementary way as well. A gemini can be drawn to your sagittarius personality, as in "opposites attract", because they complete each other, they bounce off each other.
A detail minded, methodical virgo personality (rising or personal planets) might react in a different way to the free flowing sag energy.
These are just generalisations obviously, and there are a lot of factors in the charts that can cause attraction.
To give an easy example, a person with strong Jupiter in their chart might be drawn to a sag ascendent, again because the energies resonate and reflect each other.
Your chart has quite a bit of Capricorn in the ascendent, so you might also attract Saturn-types.