I can't help but feel that obsessively mindful people always seem to have some deeper underlying issues that they need to cope with. I know a guy who for years went into all kind of new-age seminars, practised mindfulness constantly and then in a moment he told me about his traumatic event that has plagued him since childhood.
All the mindfullness was practised because deep down he felt at unease. Don't get me wrong, it is good to be observant and mindfull, but it is unnatural to be it all the time.
Our minds also need daydreaming, dull phases, excitement, the whole package.