As a researcher I deal with large amounts of texts using dedicated apps like Nvivo or Atlas.ti, or for lit Qiqqa. the principle of theses QADQAS or ref manager is the same: tagging portions of texts with nodes/tags/categories so then you can do a transversal reading of all your data by category or topic. I would love to have this feature in Evernote, which I use mainly to type in and archive my field notes and web article clips. So far you can tag an entire note, but you cannot assign a particular bit of text to a tag, this is really too bad in my opinion. Other note taking software allow this feature (Microsoft couterpart) and many of my colleagues have now either started or migrated to that other software partly because they do support tagging datum/particuler selections of text. But overall I love Evernote so I wish we could have this feature in a near future.
This is a long shot, but if you are a user who would also like this feature please do not hesitate to reply to this post to show your support to this request.