Please, reread the Off-Topic carefully but before that, read the On-Topic paragraph: On-Topic: Anything that good hackers would find interesting. That includes

Please, reread the Off-Topic carefully but before that, read the On-Topic paragraph: 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.