Nowadays, I add an article to both Instapaper and Pocket. I used to use Pocket a lot but sticking on Instapaper more.

Things I love about Pocket are

- Curated (and from other people I followed) "recommendations",

- tags "Best Of", "Quick Reads".

- beautiful android app

Instapaper has less features than Pocket but I find that

- Instapaper article parser is better,

- UI is cleaner, highlights ( I love these!),

- ability to switch style (type faces, article background)

- speed read

- they also have "Browse" (something similar to Pocket's recommendation?) but in Android app, it's a bit hidden in the drawer menu so I don't use it often.