As fascinating as the data could be (I never managed to transform it like this), the constant recording of every single thing made me stop enjoying things. It made me hyper-conscious of everything going on in my body as the primary goal was to figure out some health issues. Everything I felt or did seemed to have an "event handler" attached to it.
I now just stick to one line a day in a spreadsheet as a sort of diary.
To anyone attempting it:
1. Figure out what you want to do with the data first. Even if you just want some pretty graphs, create some random test data and set everything up so you can see these graphs. Don't just throw data into a black hole for years.
2. Make sure recording the data is as easy and comfortable as possible. That android app from the article looks good, but you have to be absolutely sure it's okay to use many times a day. Be aware that there's no good answer to "why do you keep reaching for your phone all the time?".