Taurus: doesn't even notice you're ignoring them usually
Gemini: gets super upset and may confront you, but won't usually retaliate.
Cancer: also hates being ignored; may try to guilt-trip you into paying attention to them again or try to "make" you miss them
Leo: ignores you back to save face but takes it really hard
Virgo: gets angry, but sees it as your loss
Libra: ignores you for about half the time you've been ignoring them, then tries to move past it
Scorpio: HATES being ignored, even though they're usually the ones doing the ignoring.... will drop you like a hot rock if you ignore them
Sagittarius: doesn't notice or care
Capricorn: gets sad about it, but won't confront you or retaliate; they'll just distance themselves
Aquarius: gets slightly peeved and insecure, but generally moves on quickly
Pisces: will generally disappear. they want you to come back and find them, but if you don't, they'll wander away and not look back.