Papers should be well written so that can present the facts in a simple to understand manner. I believe the choice of journal also matters as more often than not as researchers will look for articles in subject specific speciality journals and hence a good article may get overlooked in the process
I think the type of the journal and impact factor as well as whether the work is interesting or not. Good methodology and well prepared work make it attractive.
I Think firstly the area of research conducted, secondly the powerful of manuscript, thirdly if the research is published in high impact well known journal and finally the free of charge availability of research.