"On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity."
But I put it to you that some topics -- such as US politics -- are less likely to gratify one's intellectual curiosity than to provoke reaction and negative emotion.
Already sometimes seemingly less-incendiary topics get a bit distracting, which is not too bad within limits but it's probably not an improvement to go that direction intentionally.
No mater how good their skillz, the best hackers don't troll.