Neptune opposite Lilith (orb 1.1°) puts the two planets face to face, with visible back-and-forth or tension. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Neptune in Sagittarius in House 3 brings imagination, image, popularity, collective moods, and inspiration into House 3 (speech, learning, and the close environment), with Sagittarius style (expansion, travel, belief, and the search for meaning); Lilith in Gemini in House 10 brings pure ideal, absolute demand, fascination, and refusal of compromise into House 10 (vocation, status, responsibility, and public image), with Gemini style (curiosity, language, movement, and mental adaptation).
Concrete conflict: this aspect sets Neptune (imagination, image, popularity, collective moods, and inspiration) across from Lilith (pure ideal, absolute demand, fascination, and refusal of compromise), with a back-and-forth that answers or contradicts itself. Visible angle: Neptune near the IC (orb 0.2°) and Lilith near the Midheaven (orb 1.0°) touch angles; this aspect is easier to notice through private base, family roots, and intimate psychological climate; also through social role, reputation, career, and public image. The house conflict is between House 3 (speech, learning, and the close environment) and House 10 (vocation, status, responsibility, and public image); pressure in one field tends to reactivate the other.