I understand the need to get something completed, that's the downside of painting what I feel like, when I feel like it.
I'm just "lucky" I hardly ever get a game in, so the urge to complete an army is less pressing for me*. But I've had the luck that the last year or two I've been fairly consistently focussed on fantasy stuff, allowing me to make, if not a dent in Mt. Lead, at least a noticeable increase in the amount of painted stuff.
Come to think of it, I may have informally declared an Oath of Moment myself for this year, as I have resolved to focus on building more scenery this year.
*: Frostgrave may have changed that though. Just need to figure out and collect a suitable warband.