Joined in 2009. Pretty much never browse Reddit anymore other than specific scenarios.

Maybe try with a bit of milk. If you enjoy black coffee why go for something unhealthy like creamer?

Not that I ever cared about karma, but I can see why some people did. It plays into peoples need to be liked. Karma associates a number with how well your post is doing. Bigger number = more people liked your post. Basically quantifying how well liked your post is and then gamifying it.