I love this topic. Here's the lowdown on what I believe in:
The Planet Person in someone's First House always feels it more. First House rules appearance so a planet falling into a house means the Planet Person liking/disliking the House's appearance.
As for the rest, for me, the House Person feels it more.
Indicators of attraction (emotional + romantic - best combo)
Moon/Moon
Venus/Venus
Venus/Moon
Venus/Pluto
Moon/Pluto
Moon/Ascendant
Planets in someone's 8th House
Planets in someone's 4th House
IC conjunctions
Indicators of Sexual attraction
Venus/Mars
Venus/Pluto
Moon/Pluto
Moon/Mars
Mars/Pluto
Mars/Sun
Mars/Mars
Mars/Ascendant
Venus/Ascendant
Planets in someone's 1st, 5th and 8th House
Conjunctions to ASC
Indicators of basic harmony/compatibility
Sun/Moon
Sun/Sun
Sun/Venus
Moon/Jupiter
Sun/Jupiter
Venus/Jupiter
Mars/Jupiter
Sun/Ascendant
Planets in someone's 7th House
Conjunctions to DC
Indicators of good communication
Venus/Mercury
Sun/Mercury
Moon/Mercury
Mercury/Mercury
Planets in someone's 3rd or 9th House
Indicators of Longetivity
Sun/Pluto
Sun/Saturn
Venus/Saturn
Mars/Saturn
Moon/Saturn
Indicators of Karmic/Soulmate/Past Lives connection
Sun/Moon/Venus/Saturn conjunct AC/DC/IC/MC (Planets to Angles)
AC/DC/IC/MC conjunctions (Angles to Angles)
Pallas/Sun
Psyche/Moon
Eros/Psyche
Vertex/Vertex
North Node/North Node/South Node/South Node
Vertex/North Node/South Node
Ceres/Ceres
Juno/Juno
Hope this has been helpful!
