I suppose designating "sectors of focus" for your VC firm could be harmless, so long as it's only something you tell LPs and not something you start … - Paul Graham

Competitors punch you in the jaw, but investors have you by the balls.

When you try something new, you inevitably attract haters. So not being deterred by haters is one of the skills you need in order to make change happen. Like most skills, it's a combination of natural ability and practice. But don't expect not to have to practice.

The difference between a random fact and (for lack of a better word) a non-random one is how many other facts it's connected to. The latter kind are better.