Hitting this kind of wall/ceiling in my own career. It sucks. I know there are certain types of responsibilities I just can't or shouldn't take on as I can't gu

Hitting this kind of wall/ceiling in my own career. It sucks. I know there are certain types of responsibilities I just can't or shouldn't take on as I can't guarantee consistent enough performance. By the same token, I also know what it is I'm unreasonably good at. I'd very much like to just be allowed to operate purely to my strengths dipping in and out particular streams of work when I have bandwidth to do it. When and where I've been able to do that it's always been really, really good. When and where something is lumped on me that I can't handle on an indefinite basis it always eventually ends in non-linear behavior due to straying too far outside my safe operating envelope.