I opted for the Nexus 10. I use it most for reading (mostly for work - about 4-5 hrs a day), surfing (for research and pleasure 3-4 hrs a day), watching movies (1 hr or so a day). Recently, I got myself a keyboard and will be using it to create draft documents which I will sync via the cloud (using apps like Google Drive and Evernote) and which I will import into Word which resides in my laptop. I probably could not have done all of this with the Nexus 7 because of the screen size which, to me, is a bit small. In other words, what I am trying to say is that your choice - aside from your personal preference - will depend on what you want to do with the tablet.
Edit: I forgot to add, I carry it (and now with the case) everyday - including on holidays/ weekends etc.).