1. Scientists like Neil deGrasse Tyson.
2. Amazing people like theRadBrad, who is a YouTuber and beautifully and selflessly uploads Let's Plays. His commentary is very enjoyable and I get to know the plot of the game.

3. My reflection. I have some neuropsychiatric and neurological disorders. I want to help find better treatments for them.

If I were to add more,
4. Reddit.
5. The song "High Hopes" by Pink Floyd. Since the album's name is "The Division Bell", I think about my school days (I am in college now) and I feel sad but happy at the same time.