Nothing feels better than mastering a specific workflow in Blender. After using visual studio all day, it's like a breath of fresh air to click through a scene and have the tool respond like it actually cares about UX.
And that's when you learn Houdini and open up a workflow from 2008 and it still works the same, despite SideFX pushing out an insane amount of features every release (look at their SneakPeaks).
But nothing feels lousier than coming back after a few months and finding out that you've forgotten how the workflow goes.