Explain please!!

Discussions that simply pose a simple "this or that" scenario are not really encouraged here, so I wouldn't respond to them so much. They will often all under the "poll" category, which is also discouraged. For example, a post that simply says "do you prefer chocolate or vanilla ice cream", would fall in to that category.

I guess it depends on what they've written. If it's just little tale of daily life, then you might comment on how you relate to it. But if you have nothing to say, then I guess you should move on to another discussion.

It would depend on the discussion. It doesn't have to be a question, you can just tell you story in relation to the original discussion.

It is definitely sad that some people around continue doing that. I believe they would be mostly newbies. If you can relate anything and share all good. But in most cases (related to such discussions) I find that there is nothing much to write. On some instances, the OP will not even return to reply to what you have commented, but dont lose heart. You have done your job and Mylot knows that. But if there is nothing much to write, you can either - 1. Find some responders on that discussion and try interacting with them or 2. You can hop on to find another discussion - I prefer the 1 and 2 more when I encounter such a discussion.