If it's relevant for their site visitors then it's relevant for your site. If someone seeing the link on their site is inclined to click it and visit your site then the link is good, imo. If that's likely to happen then you can pretty much bet all the algo factors likely to benefit your site are lining up. That's pretty much how I define relevance.
Goodness, no! See point 1 above.
No, no, no. Do we have to spend time talking about this again? See points 1 and 2 above.
Yikes, this only matters if you're using shortcuts. Otherwise it shouldn't even be a concern.
5.Quality of Content
This is important because it's a signal of other things happening behind the scenes and lurking in the future, both positive and negative.
How would you even measure this? I think it's overruled and made irrelevant by point number 7.
7.No of daily visits
This is a metric of whether the site is doing something good or not. Nevertheless there are some sites that are really good but not promoted and are withering, I see these fairly daily. What do I do? I give them a pass. No such pass for a site that's been around awhile and the content is not so good, etc.
8.No of OBLs from the page where I get a link from
No, no, no. Unless you're paying for the link this shouldn't be a concern. This is not anything I concern myself with.
9.No of pages indexed
This will pretty much confirm the negatives to the above points, except for those sites that build it and are waiting for "they" to come. And waiting. And waiting. And waiting...