I know exactly where you are coming from too. Over the last 5 or so years I have struggled to paint things in more than short (10 or so hours out of a month or there abouts) bursts of focus. What makes it worse is that for every mini I have painted I\'ve bought a hundred!
Like some others here I find painting pretty stressful. At least it is when I am trying to do the best I can, and in recent years I\'ve just struggled to conquer that and make any sort of progress with completing minis. It\'s an intensive and very focused process for me, where the smallest slip up is a real pain, which makes it hard for me to want to do it. When I was younger and less bothered about my models being a masterpiece (or at least less aware that they weren\'t masterpieces!) I enjoyed painting more and found myself getting motivated more. As you are always casting your critical eye over things with your articles, and the stuff you are painting now is for GD, perhaps you have burnt yourself out by trying too hard to achieve, and have forgotten how nice it is to just finish off some minis.
I rushed a batch of Tyranids out in a few days a while back and although they were nowhere near my ideal standard it felt good to just paint and complete some stuff all the same. Maybe trying some speedier painting would help you get motivated again. If you are a gamer try and get an army, or at the very least a warband together for gaming. If you aren\'t you could still do an army quickly and sell it. Perhaps it is madness suggesting you try and paint more in order to motivate yourself, but it worked for me.
I have recently discovered that unlike the trials of painting, sculpting is utterly relaxing to me. It may be because I am naturally better at sculpting than painting, or it may be that the process is different enough to what I have grown used to, and the improvements I am making are spurring me on, but sculpting is how I\'m currently keeping my hobby interest really going.
If you don\'t feel like painting try something else. Have a go at sculpting, do some gaming, make some scenery, mix it up.
Or, just chill and do the things that you are currently enjoying. If you want to do mini related things further down the line you will come back to it. I gave it all up when I went to university, but had felt the pull of the hobby and bought some new minis and paints by the time I left.