Avoid vague ones like "Question" or "Thoughts?". Instead, make it curiosity-driven, personal, or debate-sparking:
"What's the one upgrade that actually transformed your [setup/hobby/workflow]?"
"I tried [popular thing] for a month — here's why I'm going back (or not)"
"Unpopular opinion: [hot take] in [niche] — who's with me?"
Good titles are specific enough to filter interest but broad enough for multiple people to relate.