My prospective co-founders and I were pitching to a VC firm that was, on paper, a really good fit for what we were trying to do. The partner we were pitching to was, 15 years ago, briefly my manager's manager -- some work relationship there, she remembered me and I her, but we didn't work super closely together and it had been a very long time. She had moved on at that company to more big-shot things and ultimately become a partner at a respectable VC firm.

About 10 minutes into the pitch, she cut us off, and basically said -- as absolutely kindly as something like this can be directly said -- "I am not going to invest in this, and furthermore I don't think what you're trying to do is investible at all". Then she took a bunch of her time to run us through why, help us understand some very fundamental things about the VC world we didn't quite have right, and generally be brutal but extremely useful in us framing what we were trying to do.

She didn't have to do that. She could have nodded along and then given us a polite "no" like everyone else. She could have cut us off and given us a rude "no". But she didn't -- she made sure to use the time we had to help us as much as she could, even if she very adamantly was not going to invest.

Not a big gesture or anything, but kind and helpful. There's a lot of that. But it doesn't make headlines.

It’s a very fine line between being helpful and a jerk. Same story to someone else may have ended up as a bad Twitter story.