I think you know what you're up against when you take on a piece that you know is going to involve dragging up a lot emotions - you can end up being deeply immersed in gloom. ↗
Like most musicians, I'm good at becoming immersed in the music that I am currently working on. We seldom lift up our heads to contemplate even the music we will be doing in the future, let alone what we've done in the past. ↗