Hi, I'm not clear on correct SO etiquette--especially WRT when to vote-up. Here is a scenario: I asked a question. Two people responded with answers, and there was plenty of comments/discussion. Their answers were helpful, but not completely satisfying. I did more research, then wrote my own answer. See here. Now I do appreciate their answers, but I think my own answer is the best one. Should I vote-up their answers to show my appreciation, and to reflect that they were helpful? Or should I only ever vote-up the best answer? Is there a guide on this stuff somewhere?
I now see that, hovering over the up arrow by a question shows "This answer is useful", so I guess that answers that.